THE MARCH OF SCIENCE 131 
also indicate areas in which further search is likely to be 
well rewarded. 
Since the Aberdeen University Bird-Migration Inquiry 
was set afoot in 1909, 27,802 birds have been ringed, and 
of these 879 have been recovered, some near and some far 
from their breeding grounds. A valuable and interesting 
account of the results of the Inquiry appears in The /bis 
for July 1921. Here Dr A. Landsborough Thomson analyses 
all the data obtained, and gives proof of the return of certain 
species—Swallow, Spotted Flycatcher, and Swift, to the same 
summer quarters, of the migratory idiosyncrasies of the 
Lapwing, of the immobility of certain “ garden” species, and of 
many other facts which will go to the making of a satisfactory 
theory of migration. 
A succinct and well-balanced summary of The Value of 
Lirds has been prepared by Mr Hugh S. Gladstone (77vaus. 
Dumfries. and Galloway Nat. Hist. Soc. 1921),in which he 
adjudicates the economic significance of all the commoner 
British species, and makes a strong appeal for the formation 
in this country of an Ornithological Advisory Bureau on the 
lines of that long since established in the United States of 
America under the U.S. Department of Agriculture. 
In another part of this number there appears an account 
of one of the finest Red Deer’s heads ever found in Scotland. 
For many years it has hung in a Scottish mansion, until 
valuable details of its discovery have been lost. There 
must be many more unrecorded heads of prehistoric Red 
and other Deer in the halls of Scotland, for they were found 
in plenty during the marl-excavating activity of the late 
eighteenth and early nineteenth century. We should be 
glad to receive records of any such, but especially we should 
be glad to receive for examination and record at the time of 
jinding any fragments of antlers, regarding the identity of 
which the discoverer may be in doubt, 
