238 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
The library contains 25,629 volumes, 1401 current, or otherwise 
incomplete, volumes, and 13,311 pamphlets. 
Among the more important gifts to the library during the year 
have been the bequest of the late Robert C. Waterston (120 vol¬ 
umes), some books from Mr. James M. Barnard (29 volumes), and 
Field’s Bibliography, received from the Trustees of the Thompson 
Fund. 
New exchanges have been arranged with the Philosophical Society 
of Washington, the Kongliga Universitets-Biblioteket, Upsala, Swe¬ 
den, the Royal Geographical Society of Australasia, and the Bernice 
Pauahi Bishop Museum, Honolulu. 
One exchange has ceased. The Society now exchanges its pub¬ 
lications with 435 institutions and periodicals. 
Eight hundred and ninety-two books have been borrowed by 182 
persons; 441 have been borrowed for use in the building; the 
library has been consulted about 350 times. 
Four hundred and one volumes have been bound in 270 covers. 
Twelve volumes of the Proceedings of the'IT. S. National Mu¬ 
seum have been indexed. Current volumes of serials previously 
indexed, are indexed as received. 
Walker Prizes. 
The subjects for competition appointed for 1900 were: — 
1. Stratigraphy and correlation of the sedimentary formations of 
any part of New England. 
2. A study in palaeozoic stratigraphy and correlation. 
The Committee has reported the following awards: 
A prize of one hundred dollars for the essay entitled, “ A study 
in palaeozoic stratigraphy and correlation: the Hudson River beds 
of the neighborhood of Albany and their taxonomic equivalents,” 
by Rudolf Ruedemann, Pli. D. 
t/ * 
A prize of fifty dollars for the essay entitled “ Cephalopod zones 
in the Carboniferous of North America: a study in interregional 
correlation,” by James Perrin Smith. 
The subject for the award in May, 1901, is:— 
A monograph on any problem connected with, or any group 
belonging to, the North American fauna or flora. 
