FOHKWOKI) 



TifK Hvccmti of Ui(; ])v<)]yAgii.Ui)n j)n>nvixin was tjjc 

 roKult of the wholehearted cf^opei'atiori of many 

 indiviflualK in the varioiiK orf^urjizaf ions i-oncurncA, 

 not only in thin country hut in Jvij^land, Canada, 

 New Zealand, and Australia, The rnaj^nitude of the 

 reHearch work aecoinpliKhed wan poHKible only 

 becaufse of thf! wilJinsness of the worlcers in many 

 organizations to undfjrtakf, tlieir parf.s of th(! overall 

 prof^rarn. Irj fafi, tlje entire program of the f'om- 

 mittee on J^ro|;agation was carried out without the 

 necessity of the Committee exercising directive 

 aiithority over any project. 



JJr. Hubert Hopkins of the National J'hy.sical 

 Laboratory in England and Mr. Donald E. Kerr of 

 the, liii/liation Jjaboratory at the MaKsachusetts 

 Institute of Technolijgy, who were working on thi.s 

 phase of the war (jffort when tlie Propagation dini- 

 mittee was formed, wi^rc. instrumental in giving a 

 good start to its activities. "J'he larg(!st single group 

 working for tlie Committee was under Mr. Kerr. 



Tin; existence of a ccjmrnon program for' thr; 

 Uniteri Nations in ladio-wavf- [propagation resulted 

 from the splendid cooperation given the Propagation 

 Mission to I<>jgland by Hir Edward Applr^ton and 

 his Ultra Short Wave Panel. Later, tlirough the 

 cooperation of Canadian engineers and scientists, 

 Dr. W. R. McKinley of the National Pi,esearch 

 Council of Canada and JJr. Andrew Tfiomson of the 

 Air Services Meteorological Division, Department 

 of Transport, 'iVjronto, C/anada, undertook to carry 

 on a part of the progr-am originally assigned to the 

 United States. The pi'ogram was further rounded 

 out by the willingness of the New Zealanrl Govern- 

 ment to undf;rtake an experiment for vvliich their 

 situation was particularly favorable. Dr. F. E. S. 

 Alexander of New Zealand and Dr. Paul A. Anderson 

 of the State Coll(;gt; of Washington initiated this 

 work. Needless to say, the labor of the Committee 

 on Propagation could hardly have been effective 

 withf^ut the cooperation of the Army and Navy. 

 Maj. Cicn. If. M. McClelland personally established 



Army cooperation, and J^t. Comdr. Italph A. Kr-Mmt 

 and Capt. Lloyd iierkner were similarly helpful in 

 (iri^arnxinii ^-^vy liaison and help. 



Officer's and scientific worker's of the U. S. Navy 

 RafJio and Sound Laboratory at San Diego, Cali- 

 fornia, altf;r'ed thf;ir prfjgr'am on propagation to fit 

 in with the over-all program of tfie Committee. 

 Capt. David Pi,. Hull, Jiureau of Ships, understand- 

 ing the irnporlance of the technical problems, paved 

 the way f'jr' ciiixiiva cooperation by this laboratory. 



Dr. Ralph liown, Pi.adio and Television Pixjsearch 

 Director', Pell Telephone I^aboratories, integrated 

 tfie resf;ar'ch prograras undertakeir by iiell 'J elephone 

 Laboratories for the Committee on Propagation. 

 This joint research program included rneteor'ological 

 mf^asurernents on iiell 'J'elephone Laboratories 

 propcr-ty by meteorologists of the Army Air Forces 

 working with Col. D. N. Yat/iS, Director, and 

 Li. Col. Harry Wexler of the Weather Wing, Army 

 Air Forces. The accomplishments of the Committee 

 on I'ropagation are a good example of the effective- 

 rifsss of cooijeration — all parts were essential and 

 rrorif; more than the rest. 



I want to thank Dr. Karl T. Compton, President 

 of Ma..ssachiisetts In.stitiite of Technology, who was 

 always willing to discuss problems of the Committee 

 and who helped me to solve many of the more 

 difficult ones, and also. Prof. S. S. Attwood, Uni- 

 versity of Michigan, whose continual counsel 

 throughoiit my term of office was in no small way 

 responsible for the success of our activity. 



Credit is also due Rell Telephone Laboratories, 

 which made my services available to the Govern- 

 ment and paid my salarj' from August 1943 to 

 September 1945, and to Cornell University, which 

 has allowed me time off witfi pay to complete the 

 work of the Committee on Propagation since 

 September 1945. 



Chas. Pt. ijr;Ki{Ows 

 Chairman, Committee on Propagation 



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