Visual display of the Aldo Leopold papers : 9/25/10-6 : Writings

				
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 
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