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r I . . . 'Co furnish means of e'{al;J.ation, rea.dings ':!ere com?iled from sta.tions upwind, L e. >Iest of the zone of ope ratior.s, ",here the seeding processes should have no effect. Seven stations west of, b\:.t near to the seeded territory, Here checked. Their normal rainfall in July ranged from about 1.1 inches to 2.5 inches. nr. Krick's ~eport on the seven u?-wind stations shows two of them had a little Greater than normal precipitation and five had less. Of the stations in the target a.ree., ell of them recorded far more than the normal fall. One hp.d only 56 percent aoove normal but the others ranged from 104 percent to 319 percent above. At five stations, all time records for the month were broken. In the entire history of "'eathar re;:>orting in Ne~! l.ie::ico, nothing approaching such a pattern of precipitation had ever before occurred in the a~eas covered in this demonstration. This instance is typical of the !~ind of data presented in the third line of evi~ence because it is ~uolicated or nearly du~licated in a large number of dernonstr~tions elsewhere. Although the evidence is convincing to a high ~egree, a fe>: scientists with unas- sailable reputations re!D8.in rather skeptical. It happens that some of them are on the ste.ff of the 0. S. ''leether :Bureau. They >lill have an opportuni ty soon either to present their sidt. or to announcs the.t they are convinced, because the 1-lea.ther Eureau is now enga~ed on a )roject, the pur~ose of which is to investigate as in- tensively as oossible all the evidence n~. available on >leather control. The end product hoped for is a valid evaluation of the possibilities. At the same time, investigation by private agencies and the armed forces will add greatly to our ,~ow- ledge. Unfort~tely, the nresent dangerous world situation may make it necessarJ to cle.ssify much of the r.ew kno~:ledge as top secret. It is exp~cted that research into methods of ~eather modification will also unearth improved techniques for forecastir.g. It may be said then that evidence s:Pl1)orting the cower of h=n agency to increase precipitation is extremely strong if not absolutely conclusive. Nearly as strong, it seams. is evidence indicating the ability to reduce it by overseeding the clouds. Consequently. it is assertec in W':1y quert<'rs that '"e have come to e. point that governmenta.l action is necessary. If le.ter study proves our pO>lers over the elements e.re not significant, >Ie suffer no injur.f except a. 'Period of embarrassment. !n the face of such convincing evidence that He do have s'u.ch ':lONerS I perha.ps in a greater measure than "18 reali ~et then. it is argued. He CB.r.~tot a.fford to delay. cr')If, as strongly indicated by the evid.ence, the amount of rair.fall can be modified, ..-4the.t re':lresents only a. begin:1ir.g in e. large field. This raises im-oortant questions ~tl.at ne;d to be answered. First, can an induced storm in one locality rob the """blouds of moisture destined in the natural course of events to fall in another place? Dr. iCrick and otilers of similer high oosition are of the opinion that a cloud loses less thpr. one percent of its moisture in the course of a very heavy storm and that it is merged very soon afteI""ards ",ith air currents which restore l1hat has been lost. Nevertileless, until this is proved definitely, any landholder in an arid or drouth- stricken a.rea has a right to look ':Ii tn uneasiness upon rainmaking opera.~ions at some distance upwind from him. Another natural question, if \-Ie grant po~er of weather modification, is just how much can rainfall be effected? Scientists active in the field believe that orecinitation over nea.rly B--~ e.ree. in nearly e;ny year can be increased by at least fifty p~rcent and ve~' likely by wore than 100 percent. It is claimed also than rainfall Can be made less irregular, or one oight sey, less freakish, and that it can be induced to fill in ,.here there are lor.g, seasonal dry s:::>ells such as B.re characteristic of California. Eo"!ever, one must recognize b.e ?ossibility that constant region- or nation->Tide use of cloud seeding might merely suoeri!Dpose its effect on the natural :rea1dshness of ,"eather or even result in greater range of irregJ.larity over short peroods. Consequently, until theories, no matter h~1 logical, are refined into more nearl:r exact kno,..,le~ge the"n is r,o., .')ossessed. '..re shall find planning based upon - 5 -