OUR EXCHANGES 
1 “The S.A. Ornithologist” for July, 1925. 
‘A Trip to the Coorong” by J. Sutton, is an interesting feature. 
2. Smithsonian Reports: 
(a) . “How Deep is the Ocean 
(b) . “Two Decades of Genetic Progress.” 
(c) . “Observations on a Montana Beaver Canal.” 
(d) . “The Republic of Salvador.” 
(e) . “The Tent Caterpillar.” 
(f) . “The Archeology Collections in the U.S. National 
Museum.” 
(g) . “Some Aspects of the Use of the Annual Rings of Trees 
in Climatic Study.” 
(h) . “The Age of the Earth.” 
(i) “Fogs and Clouds.” 
(j) “Proceedings of the Academy of National Sciences, 
3 .. “Proceedings of the Academy of National Science, Philadel- 
phia, U.S.A.” 
4 “The Australian Museuni Magazine” for July, 1925. “ The 
Cultivation of the Oyster” is one of the excellent articles. 
5 A number of phamphlets (in Polish and English) from the 
Polish National Museum of Warsaw. 
6 “Journal o. the. Arnold Arboretum of Haward University.” 
October, 1924 and April, 1925. 
7. “The Victorian Naturalist,” June, July, August numbers. 
8. “The Australian Naturalist” (N.S.W.), April, 1925. 
“Watson Microscopic Record,” No. 4., Jan., 1925. 
The current number, received from Messrs. W. Watson & 
Sons, of Evans’ Buildings, James Place, Adelaide, contains 
material of interest to all microscopists, an article on “The 
Microscope and Pond Life” should prove of use to members 
taking an interest in pond life. 
