Visual display of the Aldo Leopold papers : 9/25/10-1 : Correspondence

				
Title of Davis's paper: "The size of bursa of Yabricius compared with
the ossification of skull and maturity of gonads of some Brazilian
birds".
March 3, 1945
Dr. David 1. Davis, P. A. Sanitarian
Typhus Control Unit, Health Department
San Antonio, Texas
Dear Dr. Davis:
Your undertaking is interesting and important, but I fear too big to be handled
so briefly.
Without experimental controls, Is it possible to classify with accuracy into
immature and mature, especially in small samples colleoted at random seasons?
At least I think you should go into more detail on just how the classifications
were made.
I can't see that Table 1 has any validity. It ignores season, and the proportion
of imatures, of course, vaties seasonally. Are you familiar with the concept of
turnover? If not, the attached reprint might be of help.
Table 2 might be interpreted in terms of turnover, but not knowing the life
history, I can't do it. The samples are too small to be separately significant,
and one can't add them without *adding apples and potatoes".
In general, I just feel helpless in giving you any advice, because I know too little
about the species, and too little about the methods of sampling and classification.
I fear, though, that your materials are too meagre for so comprehensive a treatment.
They undoubtedly could be treated some way, but I can't visualize the way.
Bear in mind that I know no physiology. I would seek the advice of somebody who
knows physiology and who has done such work before going to print: at Wisconsin
Kirpatrick, Irven hass, Dr. R. K. Meyer, Hans P. Thomson would all be more
competent than 1. All but Dr. Meyer are in Service, and he is so busy that I do
not feel at liberty to refer your paper to him.
I appreciate your consulting me, and I assure you I'd like to be more constructive
if I knew how.
Yours sincerely,
Ald. Leopold
Professor of Wildlife Management

cc Meyer, Base Thomeson, Kirpatrick



					
				
					
PHONE MARQUETTE 4140

Izaak Walton League of America
Milwaukee Chapter
MURL DEU SING
SECY. AND TREASURER
SIB W. WISCONSIN AVE.
MILWAUKEE, WISCONSIN
OFFICERS
EUGENE WENGERT
PRESIDENT
LAWRENCE A. HAUTZ
VICE-PRES.
MURL DEUSING                                      "    Z-1
SECY-TREAS.                              0
DIRECTORS
DR. E. B. KOHLSOORF
DR. E. A. FLANCHER
PAUL SCHOLZ
CARL P. DIETZ
CLARNCE UNGCollege of Agriculture
CLARENCE JUNG
HENRY STENZEL
KEN E.EERS     University of Wisconsin
KEN E. BEERS
HARRY NEWTON         idison  Y.isconsin
SIDNEY R. HARTWELLT                      S
dear Mr. Leopold:
Enclosed find our check to cover your
expenses on your last visit to us.
Your report has been an enense heln to
us. We are now going ahead. Our first job will
be an investigation of the human factors in the
New Berlin area. If organization of the area is
possiile we will go ahead with t1e plan. In that
case we will be callinrg upon you1 for help angan.
3incerely yours,
hM 1,r l Deusin,  e.rf-tarv

"WE PLEDGE TO POSTERITY THE OUTDOORS OF OUR ANCESTRY"