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<br />CHAPTER V <br /> <br />GE~~RAL OBSERVATIONS <br /> <br />As a result <br />a cloud-seeding <br />have been made. <br />on the specific <br />to any project. <br /> <br />of the experience gained by this analysis of <br />experiment, the following general observations <br />vfuile the first observation has bearing <br />project studied the remainder might pertain <br /> <br />1. Note that the Il.RDC'S forecasts for MarCh, April, <br />and then May, 1951, predicted above normal precipitation for <br />this area. The U. S. Weather Bureau forecasts were also of <br />the same nature. The statistical trend lines shown in the <br />report indicate the possibility of a wet cycle. All of these <br />factors reinforce the need for more research in the field of <br />artificial nucleation to explain the dry spring period under <br />seeding. <br /> <br />2. The discoveries, experiments, and conclusions of <br />many prominent scientists strongly support the opinion that <br />the science of increasing precipitation may have great <br />possibilities. There is, however, no agreement at all at <br />the present time amonG outstanding meteorologists that <br />economically significant changes can be brought about. The <br />Civil Engineering Section Staff firmly believes that muCh <br />more experimentation on a field scale of practical size <br />should be carried out for several years in order to determine <br />the pertinent facts and to apply those facts to intelligent <br />practical Use. Evaluation should be dene by an impartial <br />scientific agency. The staff is convinced, further, that <br />this work must be accomplished on a strictly scientific <br />basis with the primary objective of obtaining the necessary <br />basic information. This means adequate control areas in the <br />vicinity of target areas, close cooperation betHeen operator <br />and evaluator, and adequate staff to do the job. <br /> <br />3. A possibility of obtainin6 comparison between natural <br />and artificial results might be to pick days at randorn on <br />which there would be no seeding, as against days when seeding <br />would be tried. <br /> <br />T~f11 <br /> <br />4. To promote mutually beneficial research cooperation <br />betHeen the operator and the evaluating agency (as a repre- <br />sentative of the purchaser), a staff member of the latter <br />should observe and consult with the operators frequently <br />during the contract period. <br /> <br />5. vfuile more seasons of research will undoubtedly lead <br />to better methods of evaluation and analysis, the methods <br />used in this report are believed to be as good as any now <br />available and that they are sufficiently sensitive to <br />indicate any signific~~t changes which may occur. When <br /> <br />" <br /> <br />10 <br />