the eistene of dsase In any (        pouation is a more or 
loes   rma  codi     . While it my not be a de4rable 
condition* it It ocourwi th rglitand withut proucin 
excetve mortality, It shuld be cred as within th 
ordnay or expeted state of affa ir. The wiavaloe of 
cooo In huves a of N         sree of other 1eeses,, may 
o w       my be fatal upon Occasion, Is a ease In point. 
Bt it Is tM    that game meste        the fact tt th 
r    pse     of a disease  ay not have any ei1f1cg.* 
whatever, fro a cyclic standoint, kany individualsm 
ewe 4ie from iuch d1sease, an   the ooomoe sti    not 
eylio Impotance, i.ll, for 2amle, not Infrequetly 41 
fromise1 sesThat fact, hever, does not mea that quai 
are necesrly oelio, or if cyaliQ that 41ioas Is ncesri 
the aeny of dswses. 
From a     tracticalst1  n dpit, it is wer imtant to 
stblish or determine the field ecoloy of a        spee. 
and to undoratmd all of the many faotoxe anm    biain 
which orte in I ts favor or gainat It$ than to give undue 
weight or impotance to the demonstatio of disease in the 
In~boratory. Yar from miniizin   th tuporzwoe of laboatr 
stuy, however, this vis   int makes desie ble very extensive 
and detailed laboratory studies to round out the eavog1. 
plaotuws. The point Is that the piling up of laboratory 
evidee of  iee. mt b      I aterpretd on the basis of fielt 
operbence ea ebseration. When  eh field work fails to 
enconter wide spread lthal disese even upon      4?e stud, 
accptaoe of dseasea     th     imateg aenc    I* a   sot to 
uatloal difficlties, T           i, in short, ts the penest 
sitatim  Thoe Is a glain l.ack- Of field ovi4enae tosupr 
tho disease theory of cyulic decrease in Snowshoe Hres. 
No atual aosing of oIowshoe Hrs. has ben attepted 
by me for the reason that all census methods knlown appest 
wholly inatqato, at least for thIs season of yea. While 
the   wsho   Hare is not ounonly spposed to usorowss. 
he does to extesivly,, and he also uses logs, hiing placos 
uandor old pine stumps ant roots, as well ILs very well cealed 
forms beneath ewgrn buhs, bruwh and thiock fois, Probab 
no Wisonein         Is so Iseutisve to wather o)aes as Is 
the U   oweo, ZA wt watho   they "hole iap' for very con. 
*Adorable periods. During the autullcag         fclr 
furhom~r, om   hares are often In avwiooe of the wouthsw, 
tt Is, re patially or newly white whileA ies 
still bae an brwm, ?re haZes have. t              to *he  *p 
or to got into very thl* .ovw, As a rosmlt, butbqgWjje 
Ift a tswlttOr Wll wupplit with vetbuk 6=$ olo 
loo  stups ant fallen brush is rolativoly upoetIV9 V~tU 
&t  hoswY Nnolleo ant If oe were, to jude fromh     ni mals 
 
pp. a 
 
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