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UNITED STATES DEPARTMENT OF AGRICULTURE FOREST SERVICE ROCKY MOUNTAIN FOREST AND RANGE EXPERIMENT STATION ADDRESU REPLY TO DIRECTOR AND REFER TO FORT COLLINS, COLORADO RR - M February 21, 1940. Supervision Biological Factors Professor Aldo Leopold, 424 University Farm Place, Madison, Wisconsin. Dear Professor Leopold: I am pleased to learn that your students are interested in phenology and that you have found Tech. Bull. 686 useful in your work. Mr. Price and I derived a lot of pleasure in seeing the results appear as the data were analyzed. I am not an authority on animal phenology but I can see the desirability of such observations being kept parallel with plant records. We are not aware of any society or bureau that fostersthe keeping of such records and this station is not prepared to maintain an activity of this kind at the present time. However, the idea has such a wide application that it appears to deserve further conside- ration. We are taking the liberty of forwarding a copy of your letter to Mr. W. R. Chapline, Chief, Division of Range Research, Forest Service, Washington, D. C., who is in a better position to state the part the Forest Service is willing to play in furthering this activity. Assuring you of our interest and willingness to cooperate insofar as we are able, I am Very sincerely yours, D. F. COSTELLO, Assoc. Forest Ecologist. cc-Mr. Chapline
42*4 tUiversty Fez. ?I*** rwv"T~ 10,, 140 040n, uueh C~n btlA1MnonG YOlI phqualog 1 bulletin (Tech. Bull. U.S.D.A. 656) My stdm r ail iaeeo in phaw olov so t a etn the hmmofthis~ .ftb.atl oee3 recrd, kept Wallel ith plant ro s Do ya knw of reord? Itno , have yo am . Idaswh should Woul th~e ftse3*lft Sml.Iy be th. best setraX ag=W or tk. U.5.7.1.? Do you think the u.5.1.. reearc bvramb weld be 111n to take this .dr itse wing as a contiming sat1vi#y? I started to Immob the Wildlife Society on Ws, but wa ro.Ad I thS* properly, tha we &we a pw.oee4inal not a saleatifte society. We wmld hel.p, but amoboy #I** sbhv14 S& th. bel. fto? You"e slnwe14, Aldo Leopld ?zeteeeov of V1ttilfo #84ag""A 00 Oahalans Wae Hakins