THE AMERICAN BOTANIST. 
119 
exactly as is done with lantern slides. Colored plates 
from books are shown in their natural colors. This 
attachment will fit any lantern and seems destined to 
work a revolution in the illustration of lectures, etc., since 
prints, photographs and plates from any source can be 
used. 
BOOKS AND WRITERS. 
The editorial and publication offices of Floral Life 
have been recently moved from Philadelphia to Spring- 
field, Ohio. 
Houghton, Mifflin & Co. announce the publication of 
Dr. C. S. Sargent's "Manual of the Trees of North 
America" with 644 illustrations, and of the first fascicle 
of Oakes Ames' " Orchidaceas." 
The Fern Bulletin has recently issued a very complete 
index to the first ten volumes, compiled by B. D. Gilbert. 
The great activity in fern study that was manifested 
during the ten years covered by the index is shown by 
the fact that more than five hundred signed articles are 
listed. In the index to species two thousand references 
are given, notwithstanding the fact that no reference is 
made to species mentioned in the magazine unless some- 
thing definite is said of them. The index covers thirty-two 
pages and costs 25 cents. 
The Wellington Field Naturahst Club, of Guelph, 
Ontario, formerly conducted a department in the Guelph 
Herald. This has now been abandoned, for an annual 
publication called The Ontario Natural Science Bulletin. 
The first issue (for 1905) contains 48 pages of well printed 
information upon the fauna and flora of Ontario. The 
biology of this region is still imperfectly known and the 
articles are therefore mainly lists of species and notes on 
distribution. Mr. A.B. Klugh, an occasional contributor 
to our columns is the editor. The price of the number is 
25 cents. 
