六级阅读第23篇
<p> <span word="More">More</span> <span word="recently">recently</span>, <span word="some">some</span> <span word="rainmakers">rainmakers</span> <span word="claimed">claimed</span> <span word="to">to</span> <span word="make">make</span> <span word="rain">rain</span> <span word="by">by</span> <span word="shooting">shooting</span> <span word="guns">guns</span>, <span word="causing">causing</span> <span word="explosions">explosions</span>, <span word="or">or</span> <span word="burning">burning</span> <span word="chemicals">chemicals</span>, <span word="the">the</span> <span word="smoke">smoke</span> <span word="of">of</span> <span word="which">which</span> <span word="was">was</span> <span word="supposed">supposed</span> <span word="to">to</span> <span word="cause">cause</span> <span word="rain">rain</span> <span word="to">to</span> <span word="fall">fall</span>. <span word="These">These</span> <span word="rainmakers">rainmakers</span> <span word="asked">asked</span> <span word="for">for</span> <span word="as">as</span> <span word="much">much</span> <span word="as">as</span> 1,000 <span word="dollars">dollars</span> <span word="to">to</span> <span word="make">make</span> <span word="an">an</span> <span word="inch">inch</span> <span word="of">of</span> <span word="rain">rain</span>. <span word="One">One</span> <span word="was">was</span> <span word="so">so</span> <span word="effective">effective</span> <span word="that">that</span> <span word="he">he</span> <span word="was">was</span> <span word="almost">almost</span> <span word="hanged">hanged</span>. <span word="He">He</span> <span word="was">was</span> <span word="believed">believed</span> <span word="to">to</span> <span word="have">have</span> <span word="caused">caused</span> <span word="a">a</span> <span word="twenty">twenty</span>-<span word="inch">inch</span> <span word="rain">rain</span> <span word="in">in</span> <span word="southern">southern</span> <span word="California">California</span> <span word="that">that</span> <span word="flooded">flooded</span> <span word="the">the</span> <span word="land">land</span>, <span word="killed">killed</span> <span word="several">several</span> <span word="people">people</span>, <span word="and">and</span> <span word="did">did</span> <span word="millions">millions</span> <span word="of">of</span> <span word="dollars">dollars</span> <span word="worth">worth</span> <span word="of">of</span> <span word="damage">damage</span>. <span word="Before">Before</span> 1946, <span word="rainmakers">rainmakers</span> <span word="were">were</span> <span word="either">either</span> <span word="liars">liars</span> <span word="or">or</span> <span word="honest">honest</span> <span word="people">people</span> <span word="who">who</span> <span word="happened">happened</span> <span word="to">to</span> <span word="have">have</span> <span word="good">good</span> <span word="luck">luck</span>. <span word="Scientific">Scientific</span> <span word="rainmaking">rainmaking</span> <span word="was">was</span> <span word="started">started</span> <span word="in">in</span> <span word="that">that</span> <span word="year">year</span> <span word="by">by</span> <span word="Vincent">Vincent</span> <span word="J">J</span>. <span word="Schaefer">Schaefer</span>, <span word="a">a</span> <span word="scientist">scientist</span> <span word="at">at</span> <span word="the">the</span> <span word="laboratories">laboratories</span> <span word="of">of</span> <span word="the">the</span> <span word="General">General</span> <span word="Electric">Electric</span> <span word="Company">Company</span> <span word="in">in</span> <span word="New">New</span> <span word="York">York</span> <span word="State">State</span>. <span word="His">His</span> <span word="success">success</span> <span word="was">was</span> <span word="the">the</span> <span word="result">result</span> <span word="of">of</span> <span word="a">a</span> <span word="lucky">lucky</span> <span word="accident">accident</span> <span word="that">that</span> <span word="changed">changed</span> <span word="years">years</span> <span word="of">of</span> <span word="failure">failure</span> <span word="into">into</span> <span word="victory">victory</span>. <span word="For">For</span> <span word="a">a</span> <span word="long">long</span> <span word="time">time</span>, <span word="men">men</span> <span word="have">have</span> <span word="understood">understood</span> <span word="where">where</span> <span word="rain">rain</span> <span word="comes">comes</span> <span word="from">from</span>. <span word="Water">Water</span> <span word="from">from</span> <span word="the">the</span> <span word="surface">surface</span> <span word="of">of</span> <span word="oceans">oceans</span> <span word="and">and</span> <span word="lakes">lakes</span> <span word="becomes">becomes</span> <span word="part">part</span> <span word="of">of</span> <span word="the">the</span> <span word="air">air</span>, <span word="where">where</span> <span word="it">it</span> <span word="forms">forms</span> <span word="clouds">clouds</span> <span word="from">from</span> <span word="which">which</span> <span word="rain">rain</span> <span word="falls">falls</span>. <span word="But">But</span> <span word="exactly">exactly</span> <span word="what">what</span> <span word="starts">starts</span> <span word="the">the</span> <span word="formation">formation</span> <span word="of">of</span> <span word="raindrops">raindrops</span> <span word="was">was</span> <span word="not">not</span> <span word="known">known</span> <span word="until">until</span> <span word="quite">quite</span> <span word="recently">recently</span>. <span word="A">A</span> <span word="man">man</span> <span word="named">named</span> <span word="John">John</span> <span word="Aitken">Aitken</span> <span word="proved">proved</span> <span word="that">that</span> <span word="drops">drops</span> <span word="of">of</span> <span word="water">water</span> <span word="gather">gather</span> <span word="around">around</span> <span word="tiny">tiny</span> <span word="bits">bits</span> <span word="of">of</span> <span word="dust">dust</span> <span word="or">or</span> <span word="other">other</span> <span word="matter">matter</span>. <span word="The">The</span> <span word="centers">centers</span> <span word="of">of</span> <span word="the">the</span> <span word="drops">drops</span> <span word="are">are</span> <span word="so">so</span> <span word="small">small</span> <span word="that">that</span> <span word="the">the</span> <span word="human">human</span> <span word="eye">eye</span> <span word="cannot">cannot</span> <span word="see">see</span> <span word="them">them</span>. <span word="Without">Without</span> <span word="such">such</span> <span word="centers">centers</span>, <span word="it">it</span> <span word="seems">seems</span>, <span word="raindrops">raindrops</span> <span word="do">do</span> <span word="not">not</span> <span word="form">form</span>. <span word="During">During</span> <span word="World">World</span> <span word="War">War</span> <span word="II">II</span>, <span word="Dr">Dr</span>. <span word="Irving">Irving</span> <span word="Langmuir">Langmuir</span>, <span word="a">a</span> <span word="scientist">scientist</span>, <span word="was">was</span> <span word="hired">hired</span> <span word="by">by</span> <span word="the">the</span> <span word="General">General</span> <span word="Electric">Electric</span> <span word="Company">Company</span> <span word="to">to</span> <span word="study">study</span> <span word="how">how</span> <span word="and">and</span> <span word="why">why</span> <span word="ice">ice</span> <span word="forms">forms</span> <span word="on">on</span> <span word="the">the</span> <span word="wings">wings</span> <span word="of">of</span> <span word="airplanes">airplanes</span>. <span word="He">He</span> <span word="and">and</span> <span word="a">a</span> <span word="young">young</span> <span word="assistant">assistant</span> <span word="named">named</span> <span word="Schaefer">Schaefer</span> <span word="went">went</span> <span word="to">to</span> <span word="a">a</span> <span word="mountain">mountain</span> <span word="in">in</span> <span word="the">the</span> <span word="state">state</span> <span word="of">of</span> <span word="New">New</span> <span word="Hampshire">Hampshire</span>, <span word="where">where</span> <span word="snowstorms">snowstorms</span> <span word="are">are</span> <span word="common">common</span> <span word="and">and</span> <span word="cold">cold</span> <span word="winds">winds</span> <span word="blow">blow</span>. <span word="While">While</span> <span word="in">in</span> <span word="New">New</span> <span word="Hampshire">Hampshire</span>, <span word="Langmuir">Langmuir</span> <span word="and">and</span> <span word="Schaefer">Schaefer</span> <span word="were">were</span> <span word="surprised">surprised</span> <span word="to">to</span> <span word="learn">learn</span> <span word="that">that</span> <span word="often">often</span> <span word="the">the</span> <span word="temperature">temperature</span> <span word="of">of</span> <span word="the">the</span> <span word="clouds">clouds</span> <span word="surrounding">surrounding</span> <span word="them">them</span> <span word="was">was</span> <span word="far">far</span> <span word="below">below</span> <span word="the">the</span> <span word="freezing">freezing</span> <span word="point">point</span>, <span word="and">and</span> <span word="yet">yet</span> <span word="ice">ice</span> <span word="did">did</span> <span word="not">not</span> <span word="form">form</span> <span word="in">in</span> <span word="the">the</span> <span word="clouds">clouds</span>. <span word="After">After</span> <span word="the">the</span> <span word="War">War</span>, <span word="Schaefer">Schaefer</span> <span word="experimented">experimented</span> <span word="with">with</span> <span word="a">a</span> <span word="machine">machine</span> <span word="that">that</span> <span word="created">created</span> <span word="cold">cold</span>, <span word="moist">moist</span> <span word="air">air</span> <span word="similar">similar</span> <span word="to">to</span> <span word="the">the</span> <span word="air">air</span> <span word="found">found</span> <span word="in">in</span> <span word="clouds">clouds</span>. <span word="To">To</span> <span word="imitate">imitate</span> <span word="the">the</span> <span word="moist">moist</span> <span word="air">air</span> <span word="of">of</span> <span word="a">a</span> <span word="cloud">cloud</span>, <span word="Schaefer">Schaefer</span> <span word="would">would</span> <span word="breathe">breathe</span> <span word="into">into</span> <span word="the">the</span> <span word="machine">machine</span>. <span word="Then">Then</span> <span word="he">he</span> <span word="would">would</span> <span word="drop">drop</span> <span word="into">into</span> <span word="the">the</span> <span word="freezer">freezer</span> <span word="a">a</span> <span word="bit">bit</span> <span word="of">of</span> <span word="powder">powder</span>, <span word="sugar">sugar</span>, <span word="or">or</span> <span word="some">some</span> <span word="other">other</span> <span word="substance">substance</span>. <span word="For">For</span> <span word="weeks">weeks</span> <span word="and">and</span> <span word="months">months</span> <span word="he">he</span> <span word="tried">tried</span> <span word="everything">everything</span> <span word="he">he</span> <span word="could">could</span> <span word="imagine">imagine</span>. <span word="Nothing">Nothing</span> <span word="happened">happened</span>. <span word="No">No</span> <span word="crystals">crystals</span> <span word="of">of</span> <span word="ice">ice</span> <span word="were">were</span> <span word="formed">formed</span>. <span word="None">None</span> <span word="of">of</span> <span word="the">the</span> <span word="substances">substances</span> <span word="would">would</span> <span word="serve">serve</span> <span word="as">as</span> <span word="the">the</span> <span word="center">center</span> <span word="of">of</span> <span word="a">a</span> <span word="snow">snow</span> <span word="crystal">crystal</span> <span word="or">or</span> <span word="raindrop">raindrop</span>. <span word="One">One</span> <span word="July">July</span> <span word="morning">morning</span>, <span word="Schaefer">Schaefer</span> <span word="was">was</span> <span word="dropping">dropping</span> <span word="in">in</span> <span word="bits">bits</span> <span word="of">of</span> <span word="various">various</span> <span word="substances">substances</span> <span word="and">and</span> <span word="watching">watching</span> <span word="the">the</span> <span word="unsuccessful">unsuccessful</span> <span word="results">results</span>. <span word="Finally">Finally</span>, <span word="a">a</span> <span word="friend">friend</span> <span word="suggested">suggested</span> <span word="that">that</span> <span word="they">they</span> <span word="go">go</span> <span word="to">to</span> <span word="eat">eat</span> <span word="lunch">lunch</span>, <span word="and">and</span> <span word="Schaefer">Schaefer</span> <span word="gladly">gladly</span> <span word="went">went</span> <span word="with">with</span> <span word="him">him</span>. <span word="As">As</span> <span word="usual">usual</span>, <span word="he">he</span> <span word="left">left</span> <span word="the">the</span> <span word="cover">cover</span> <span word="of">of</span> <span word="the">the</span> <span word="freezer">freezer</span> <span word="up">up</span>, <span word="since">since</span> <span word="cold">cold</span> <span word="air">air</span> <span word="sinks">sinks</span> <span word="and">and</span> <span word="would">would</span> <span word="not">not</span> <span word="escape">escape</span> <span word="from">from</span> <span word="the">the</span> <span word="box">box</span>. <span word="Returning">Returning</span> <span word="from">from</span> <span word="lunch">lunch</span>, <span word="Schaefer">Schaefer</span> <span word="was">was</span> <span word="beginning">beginning</span> <span word="to">to</span> <span word="perform">perform</span> <span word="his">his</span> <span word="experiments">experiments</span> <span word="again">again</span> <span word="when">when</span> <span word="he">he</span> <span word="happened">happened</span> <span word="to">to</span> <span word="look">look</span> <span word="at">at</span> <span word="the">the</span> <span word="temperature">temperature</span> <span word="of">of</span> <span word="the">the</span> <span word="freezer">freezer</span>. <span word="It">It</span> <span word="had">had</span> <span word="risen">risen</span> <span word="to">to</span> <span word="a">a</span> <span word="point">point</span> <span word="higher">higher</span> <span word="than">than</span> <span word="that">that</span> <span word="required">required</span> <span word="for">for</span> <span word="ice">ice</span> <span word="crystals">crystals</span> <span word="to">to</span> <span word="remain">remain</span> <span word="solid">solid</span>. <span word="The">The</span> <span word="warm">warm</span> <span word="summer">summer</span> <span word="weather">weather</span> <span word="had">had</span> <span word="arrived">arrived</span> <span word="without">without</span> <span word="his">his</span> <span word="noticing">noticing</span> <span word="it">it</span>. <span word="He">He</span> <span word="would">would</span> <span word="have">have</span> <span word="to">to</span> <span word="be">be</span> <span word="more">more</span> <span word="careful">careful</span> <span word="in">in</span> <span word="the">the</span> <span word="future">future</span>. <span word="There">There</span> <span word="were">were</span> <span word="two">two</span> <span word="choices">choices</span> <span word="now">now</span>. <span word="He">He</span> <span word="could">could</span> <span word="close">close</span> <span word="the">the</span> <span word="cover">cover</span> <span word="and">and</span> <span word="wait">wait</span> <span word="for">for</span> <span word="the">the</span> <span word="freezer">freezer</span> <span word="itself">itself</span> <span word="to">to</span> <span word="lower">lower</span> <span word="the">the</span> <span word="air">air</span> <span word="temperature">temperature</span>, <span word="or">or</span> <span word="he">he</span> <span word="could">could</span> <span word="make">make</span> <span word="the">the</span> <span word="process">process</span> <span word="occur">occur</span> <span word="faster">faster</span> <span word="by">by</span> <span word="adding">adding</span> <span word="dry">dry</span> <span word="ice">ice</span>, <span word="a">a</span> <span word="gas">gas</span> <span word="in">in</span> <span word="solid">solid</span> <span word="form">form</span> <span word="that">that</span> <span word="is">is</span> <span word="very">very</span>, <span word="very">very</span> <span word="cold">cold</span>. <span word="He">He</span> <span word="chose">chose</span> <span word="the">the</span> <span word="latter">latter</span> <span word="plan">plan</span>. <span word="He">He</span> <span word="decided">decided</span> <span word="to">to</span> <span word="try">try</span> <span word="a">a</span> <span word="container">container</span> <span word="of">of</span> <span word="dry">dry</span> <span word="ice">ice</span>. <span word="As">As</span> <span word="he">he</span> <span word="dropped">dropped</span> <span word="the">the</span> <span word="steaming">steaming</span> <span word="white">white</span> <span word="dry">dry</span> <span word="ice">ice</span> <span word="into">into</span> <span word="the">the</span> <span word="freezer">freezer</span>, <span word="he">he</span> <span word="happened">happened</span> <span word="to">to</span> <span word="breathe">breathe</span> <span word="out">out</span> <span word="a">a</span> <span word="large">large</span> <span word="amount">amount</span> <span word="of">of</span> <span word="air">air</span>. <span word="And">And</span> <span word="there">there</span>, <span word="before">before</span> <span word="his">his</span> <span word="eyes">eyes</span>, <span word="it">it</span> <span word="happened">happened</span>! <span word="He">He</span> <span word="had">had</span> <span word="made">made</span> <span word="ice">ice</span> <span word="crystals">crystals</span>, <span word="not">not</span> <span word="by">by</span> <span word="adding">adding</span> <span word="centers">centers</span> <span word="to">to</span> <span word="the">the</span> <span word="moisture">moisture</span> <span word="but">but</span> <span word="by">by</span> <span word="cooling">cooling</span> <span word="the">the</span> <span word="breath">breath</span> <span word="so">so</span> <span word="much">much</span> <span word="that">that</span> <span word="the">the</span> <span word="liquid">liquid</span> <span word="had">had</span> <span word="to">to</span> <span word="form">form</span> <span word="crystals">crystals</span> ! <span word="Schaefer">Schaefer</span> <span word="called">called</span> <span word="to">to</span> <span word="his">his</span> <span word="helpers">helpers</span> <span word="to">to</span> <span word="come">come</span> <span word="and">and</span> <span word="watch">watch</span>. <span word="Then">Then</span> <span word="he">he</span> <span word="began">began</span> <span word="to">to</span> <span word="blow">blow</span> <span word="his">his</span> <span word="breath">breath</span> <span word="into">into</span> <span word="the">the</span> <span word="freezer">freezer</span> <span word="and">and</span> <span word="drop">drop</span> <span word="large">large</span> <span word="pieces">pieces</span> <span word="of">of</span> <span word="dry">dry</span> <span word="ice">ice</span> <span word="through">through</span> <span word="it">it</span> <span word="to">to</span> <span word="create">create</span> <span word="crystals">crystals</span> <span word="which">which</span> <span word="became">became</span> <span word="a">a</span> <span word="tiny">tiny</span> <span word="snowstorm">snowstorm</span> <span word="falling">falling</span> <span word="slowly">slowly</span> <span word="to">to</span> <span word="the">the</span> <span word="floor">floor</span> <span word="of">of</span> <span word="his">his</span> <span word="laboratory">laboratory</span>. <span word="If">If</span> <span word="he">he</span> <span word="could">could</span> <span word="make">make</span> <span word="snow">snow</span> <span word="in">in</span> <span word="a">a</span> <span word="freezer">freezer</span>, <span word="Schaefer">Schaefer</span> <span word="thought">thought</span>, <span word="why">why</span> <span word="couldnt">couldnt</span> <span word="he">he</span> <span word="do">do</span> <span word="so">so</span> <span word="in">in</span> <span word="a">a</span> <span word="real">real</span> <span word="cloud">cloud</span>? <span word="He">He</span> <span word="decided">decided</span> <span word="to">to</span> <span word="try">try</span> <span word="it">it</span> <span word="in">in</span> <span word="an">an</span> <span word="airplane">airplane</span> <span word="with">with</span> <span word="a">a</span> <span word="machine">machine</span> <span word="to">to</span> <span word="blow">blow</span> <span word="dry">dry</span> <span word="ice">ice</span> <span word="out">out</span> <span word="into">into</span> <span word="the">the</span> <span word="clouds">clouds</span>. <span word="On">On</span> <span word="a">a</span> <span word="cold">cold</span> <span word="day">day</span> <span word="in">in</span> <span word="November">November</span>, <span word="Schaefer">Schaefer</span> <span word="and">and</span> <span word="Langmuir">Langmuir</span> <span word="saw">saw</span> <span word="clouds">clouds</span> <span word="in">in</span> <span word="the">the</span> <span word="sky">sky</span>, <span word="and">and</span> <span word="Schaefer">Schaefer</span> <span word="climbed">climbed</span> <span word="into">into</span> <span word="the">the</span> <span word="airplane">airplane</span>. <span word="He">He</span> <span word="realized">realized</span> <span word="he">he</span> <span word="would">would</span> <span word="have">have</span> <span word="to">to</span> <span word="fly">fly</span> <span word="some">some</span> <span word="distance">distance</span> <span word="before">before</span> <span word="finding">finding</span> <span word="the">the</span> <span word="right">right</span> <span word="kind">kind</span> <span word="of">of</span> <span word="clouda">clouda</span> <span word="big">big</span> <span word="gray">gray</span> <span word="one">one</span> <span word="that">that</span> <span word="must">must</span> <span word="be">be</span> <span word="filled">filled</span> <span word="with">with</span> <span word="moisture">moisture</span>. <span word="Seeing">Seeing</span> <span word="one">one</span>, <span word="Schaefer">Schaefer</span> <span word="told">told</span> <span word="the">the</span> <span word="pilot">pilot</span> <span word="of">of</span> <span word="the">the</span> <span word="plane">plane</span> <span word="to">to</span> <span word="fly">fly</span> <span word="above">above</span> <span word="the">the</span> <span word="cloud">cloud</span>. <span word="At">At</span> <span word="the">the</span> <span word="proper">proper</span> <span word="time">time</span>, <span word="he">he</span> <span word="started">started</span> <span word="the">the</span> <span word="machine">machine</span>, <span word="and">and</span> <span word="dry">dry</span> <span word="ice">ice</span> <span word="began">began</span> <span word="to">to</span> <span word="fall">fall</span> <span word="from">from</span> <span word="the">the</span> <span word="airplane">airplane</span> <span word="into">into</span> <span word="the">the</span> <span word="cloud">cloud</span> <span word="below">below</span>. <span word="When">When</span> <span word="half">half</span> <span word="the">the</span> <span word="load">load</span> <span word="of">of</span> <span word="dry">dry</span> <span word="ice">ice</span> <span word="was">was</span> <span word="gone">gone</span>, <span word="the">the</span> <span word="motor">motor</span> <span word="stopped">stopped</span> <span word="because">because</span> <span word="it">it</span> <span word="had">had</span> <span word="become">become</span> <span word="too">too</span> <span word="cold">cold</span>. <span word="Schaefer">Schaefer</span> <span word="had">had</span> <span word="to">to</span> <span word="think">think</span> <span word="quickly">quickly</span>. <span word="He">He</span> <span word="merely">merely</span> <span word="threw">threw</span> <span word="the">the</span> <span word="remaining">remaining</span> <span word="dry">dry</span> <span word="ice">ice</span> <span word="out">out</span> <span word="of">of</span> <span word="the">the</span> <span word="window">window</span> <span word="of">of</span> <span word="the">the</span> <span word="plane">plane</span> ? 80 ? <span word="and">and</span> <span word="into">into</span> <span word="the">the</span> <span word="cloud">cloud</span> <span word="below">below</span>. <span word="On">On</span> <span word="the">the</span> <span word="ground">ground</span>, <span word="Dr">Dr</span>. <span word="Langmuir">Langmuir</span> <span word="watched">watched</span> <span word="excitedly">excitedly</span> <span word="and">and</span> <span word="saw">saw</span> <span word="snow">snow</span> <span word="falling">falling</span> <span word="from">from</span> <span word="the">the</span> <span word="bottom">bottom</span> <span word="of">of</span> <span word="the">the</span> <span word="cloud">cloud</span>. <span word="When">When</span> <span word="Schaefer">Schaefer</span> <span word="returned">returned</span> <span word="to">to</span> <span word="the">the</span> <span word="ground">ground</span>, <span word="blue">blue</span> <span word="with">with</span> <span word="cold">cold</span>, <span word="Langmuir">Langmuir</span> <span word="ran">ran</span> <span word="to">to</span> <span word="him">him</span>, <span word="shouting">shouting</span>, <span word="You">You</span> <span word="have">have</span> <span word="made">made</span> <span word="history">history</span>!<span word="And">And</span> <span word="indeed">indeed</span> <span word="he">he</span> <span word="had">had</span>. <span word="Almost">Almost</span> <span word="as">as</span> <span word="soon">soon</span> <span word="as">as</span> <span word="the">the</span> <span word="news">news</span> <span word="of">of</span> <span word="his">his</span> <span word="accomplishment">accomplishment</span> <span word="was">was</span> <span word="sent">sent</span> <span word="across">across</span> <span word="the">the</span> <span word="United">United</span> <span word="States">States</span> <span word="and">and</span> <span word="around">around</span> <span word="the">the</span> <span word="world">world</span>, <span word="a">a</span> <span word="hundred">hundred</span> <span word="other">other</span> <span word="rainmakers">rainmakers</span> <span word="were">were</span> <span word="throwing">throwing</span> <span word="dry">dry</span> <span word="ice">ice</span> <span word="into">into</span> <span word="cloudsor">cloudsor</span> <span word="seeding">seeding</span> <span word="the">the</span> <span word="clouds">clouds</span> <span word="as">as</span> <span word="it">it</span> <span word="was">was</span> <span word="called">called</span>. <span word="When">When</span> <span word="Schaefer">Schaefer</span> <span word="discovered">discovered</span> <span word="that">that</span> <span word="ice">ice</span> <span word="crystals">crystals</span> <span word="could">could</span> <span word="be">be</span> <span word="formed">formed</span> <span word="without">without</span> <span word="finding">finding</span> <span word="the">the</span> <span word="right">right</span> <span word="material">material</span> <span word="to">to</span> <span word="make">make</span> <span word="centers">centers</span> <span word="for">for</span> <span word="the">the</span> <span word="crystals">crystals</span>, <span word="he">he</span> <span word="stopped">stopped</span> <span word="searching">searching</span> <span word="for">for</span> <span word="such">such</span> <span word="materials">materials</span>. <span word="But">But</span> <span word="another">another</span> <span word="young">young</span> <span word="worker">worker</span> <span word="at">at</span> <span word="General">General</span> <span word="Electric">Electric</span>, <span word="Bernard">Bernard</span> <span word="Vonnegut">Vonnegut</span> <span word="began">began</span> <span word="looking">looking</span> <span word="through">through</span> <span word="a">a</span> <span word="chemistry">chemistry</span> <span word="book">book</span> <span word="for">for</span> <span word="some">some</span> <span word="chemical">chemical</span> <span word="compound">compound</span> <span word="that">that</span> <span word="might">might</span> <span word="have">have</span> <span word="the">the</span> <span word="right">right</span> <span word="size">size</span> <span word="and">and</span> <span word="shape">shape</span> <span word="to">to</span> <span word="form">form</span> <span word="crystals">crystals</span> <span word="around">around</span> <span word="it">it</span>. <span word="He">He</span> <span word="found">found</span> <span word="what">what</span> <span word="he">he</span> <span word="was">was</span> <span word="booking">booking</span> <span word="for">for</span>. <span word="It">It</span> <span word="was">was</span> <span word="a">a</span> <span word="compound">compound</span> <span word="called">called</span> <span word="silver">silver</span> <span word="iodide">iodide</span>. <span word="He">He</span> <span word="got">got</span> <span word="some">some</span> <span word="silver">silver</span> <span word="iodide">iodide</span> <span word="and">and</span> <span word="developed">developed</span> <span word="a">a</span> <span word="way">way</span> <span word="of">of</span> <span word="burning">burning</span> <span word="it">it</span> <span word="to">to</span> <span word="produce">produce</span> <span word="tiny">tiny</span> <span word="particles">particles</span> <span word="that">that</span> <span word="would">would</span> <span word="separate">separate</span> <span word="in">in</span> <span word="the">the</span> <span word="air">air</span> <span word="and">and</span> <span word="form">form</span> <span word="snowhe">snowhe</span> <span word="hoped">hoped</span>. <span word="Finally">Finally</span> <span word="he">he</span> <span word="shot">shot</span> <span word="the">the</span> <span word="material">material</span> <span word="up">up</span> <span word="into">into</span> <span word="the">the</span> <span word="air">air</span> <span word="and">and</span> <span word="waited">waited</span> <span word="for">for</span> <span word="the">the</span> <span word="storm">storm</span>. <span word="Nothing">Nothing</span> <span word="happened">happened</span>. <span word="He">He</span> <span word="couldnt">couldnt</span> <span word="understand">understand</span> <span word="why">why</span>. <span word="The">The</span> <span word="compound">compound</span> <span word="ought">ought</span> <span word="to">to</span> <span word="form">form</span> <span word="enters">enters</span> <span word="for">for</span> <span word="crystals">crystals</span>. <span word="He">He</span> <span word="asked">asked</span> <span word="a">a</span> <span word="scientist">scientist</span> <span word="to">to</span> <span word="examine">examine</span> <span word="the">the</span> <span word="chemicals">chemicals</span> <span word="he">he</span> <span word="had">had</span> <span word="used">used</span>. <span word="There">There</span> <span word="was">was</span> <span word="the">the</span> <span word="trouble">trouble</span>. <span word="The">The</span> <span word="silver">silver</span> <span word="iodide">iodide</span> <span word="he">he</span> <span word="had">had</span> <span word="used">used</span> <span word="was">was</span> <span word="not">not</span> <span word="pure">pure</span>. <span word="He">He</span> <span word="got">got</span> <span word="more">more</span> <span word="of">of</span> <span word="the">the</span> <span word="material">material</span>, <span word="performed">performed</span> <span word="his">his</span> <span word="experiment">experiment</span> <span word="again">again</span>, <span word="and">and</span> <span word="there">there</span> <span word="were">were</span> <span word="the">the</span> <span word="snow">snow</span> <span word="crystals">crystals</span>! <span word="Today">Today</span>, <span word="scientific">scientific</span> <span word="rainmakers">rainmakers</span> <span word="generally">generally</span> <span word="use">use</span> <span word="silver">silver</span> <span word="iodide">iodide</span>, <span word="Which">Which</span> <span word="can">can</span> <span word="be">be</span> <span word="sent">sent</span> <span word="into">into</span> <span word="the">the</span> <span word="air">air</span> <span word="from">from</span> <span word="the">the</span> <span word="ground">ground</span> <span word="by">by</span> <span word="means">means</span> <span word="of">of</span> <span word="a">a</span> <span word="simple">simple</span>, <span word="inexpensive">inexpensive</span> <span word="machine">machine</span>. <span word="This">This</span> <span word="process">process</span> <span word="is">is</span> <span word="more">more</span> <span word="satisfactory">satisfactory</span> <span word="than">than</span> <span word="the">the</span> <span word="use">use</span> <span word="of">of</span> <span word="dry">dry</span> <span word="ice">ice</span> <span word="which">which</span> <span word="can">can</span> <span word="be">be</span> <span word="destructive">destructive</span>.</p>
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