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The following species give promise of furnish~ng substitutes for sprwoe as above but more experimeits are neede(I in order to overcome known difficulties before these species can be recommended: Bald cypress, Amabilis, Grand., Ioble, and rhite firs, Lodgepole pine, ITorway pine, andIZ Redwood. The following species are lighter 4,hran spruce but could be used in parts where the stresses are relatively low: Incense cedar, Western rel cedar arn Alpine fir. AS conditions change oth~er species "J2. doubtless come into consideration under these vari ous heaA.. -23-
UNITED STATES DEPARTMENT OF AGRICULTURE BUREAU OF BIOLOGICAL SURVEY WASHINGTON, D. C. ADDRESS REPLY TO CHIEF. BUREAU OF BIOLOGICAL SURVEY AND REFER TO G e -Z Game Birds February 2, 1931 lr. Aldo Leopold The Game Survey Nhdison, Wis consin Dear Aldo: Stoddard wrote me where to find the data on (iail weights from birds of known ages: that is, selected as to young,(birds of the year) and as to birds older than 1 season. These figures were taken from the Chubb Plantation in February, 1928, by Sid Stringer, birds being classified by the primary method, The sharp outer primary indicates a young bird; utde, blunt feather indicates an older bird. Sixty nime birds of the year and thirty two older birds were weighed* All sexes were figured together. -I/ 17 8;lg; j7l7v4; 1 k V168; 168;- 169; 189; 16 ; 2- of 32 birdas 5510 GraMS. I have checked over the above figures and can certify they are copied correctly from the records. I hope they will be what you want and will enable you to check up on your weight hypothesis. Sincerely, Cooperative Agent CC Herb Stoddard ,.3 - 0 ,3a U / w A1 &r. ' J . m .-It _ ., 4 ,.r ADQ "h-1V. f 1 1 0%% IR ".,,' -R