under what circumstances these birds make use of their 
wings in under-water progression, whether they habitually 
employ them and for what purposes they are used. 
My principal object in troubling the readers of this 
bulletin at all with this matter is to plead for more care¬ 
ful observation of the under-water progression of Loons, 
Grebes and Cormorants, for we seem to have much less 
information on these than on other diving birds. Let us 
take every favorable opportunity to observe them under 
circumstances where their subaqueous habits can be seen. 
It is my fond hope that any reader who has or can get any 
information on the subject will correspond with me at 
his earliest convenience, for life is short and time is fleet¬ 
ing. 
43 
