80 TRANSACTIONS OF THE [pDEc. 19, 
panded, and made into a volume, privately printed, and entitled 
“Verrazano, the Navigator.” 
Mr. Brevoort was always a great lover and collector of books, 
and his library in 1875 numbered over ten thousand volumes, 
many of which were very rare and expensive. He also possessed 
a valuable collection of medals and manuscripts. 
Among scientific men, he held a recognized and honorable 
place, but his usefulness is in no degree measured by his literary 
and scientific remains. He was a man of warm heart and gene- 
rous sympathies, and his books, his purse, and his counsel were 
always at the service of scientific workers; while his public spirit 
and philanthropy made him loved and honored as a citizen. 
Mr. Brevoort inherited a large landed property which, for a time, 
proved a heavy care and burden, but it ultimately brought the 
fruition of his plans in ease and even wealth. His home, at the 
corner of Atlantic and Bedford avenues, was one of the finest 
private residences in Brooklyn. ‘There he lived for the last ten 
years of his life in the enjoyment of every luxury, which he 
shared with generous hospitality. A large part of his splendid 
library has become the property of the American Museum of 
Natural History. 
The card announced a continuation of the 
DISCUSSION ON THE MECHANICS OF BIRD FLIGHT, 
Pror. W. P. TROWBRIDGE exhibited wings of hawks, prepared 
to show the tendons for the spreading, closing, and rotation of 
the primary feathers. 
He reviewed the former discussion and the objections which 
had been offered to his theory, and said that he had studied the 
subject and treated it from the standpoint of a student of 
mechanics. He proposed to show a tendon which spread the 
primaries, a muscle in the palm of the hand which closed the 
same, and another which rotated the hand at the wrist; also the 
worn notches in the vanes. The existence of these tendons and 
their muscles having been disputed, he claimed the discovery by 
his own dissection. 
By drawings upon the blackboard the relations of the parts of 
the wing were illustrated, and by wings of the red-tailed and 
