Gray's New Manual of Botany — 7th Edition 
An illustrated flora of the Northern United States and Canada east of the 96th 
meridian, By Asa Gray, LL.D., late Professor of Natural History, Harvard Uni- 
versity. Thoroughly revised and largely rewritten by BENJAMIN LINCOLN ROBIN- 
SON, Ph.D., Asa Gray Professor of Systematic Botany, and MERRITT LYNDON 
FERNALD, S.B., Assistant Professor of Botany, Harvard University, assisted by 
specialists in certain groups. With more than nine hundred text figures. 
Regular Edition. Cloth, illustrated, 8vo, 928 pages. Price, $2.50. 
Tourist's Edition. Limp leather, 5 х7; inches. Price, $3.00. 
MERICAN botanists, who have been impatiently awaiting the 
revision of this indispensable work, will be delighted to know that 
a seventh, completely revised, and copiously illustrated edition, is now 
ready. The revision has entailed years of work by skilled specialists. 
No effort or expense has been spared to attain the highest degree of clear- 
ness, terseness, and accuracy. The plant families have been rearranged in 
a manner to show the latest view of their affinities, and hundreds of species 
have been added to the flora. The nomenclature has been brought into 
thorough accord with the important international rules recently established 
— a feature of great significance. Indeed, the Manual is the only work of 
its scope which in the matter of nomenclature is free from provincialism 
and rests upon a cosmopolitan basis of international agreement. Nearly 
a thousand figures have been added, and scores of brief and lucid keys have 
been introduced in a manner which greatly simplifies the problem of plant 
identification. The work has been extended to include Ontario, Quebec, 
and the maritime provinces of Canada. 
AMERICAN BOOH COMPANY 
New York Cincinnati Chicago Boston 
HOME GROWN LILIES. 
Fresh from Beds. Wild Flowers, Hardy plants of all kinds. 
Send for catalogue: 
F. П. Horsrorp, Charlotte, Vt. 
BIRDS OF MAINE 
is the latest and most complete work on northeastern bird life. It 
is an illustrated work of 693 pages and contains descriptions of 
the plumage and full accounts of the nests, eggs, habits and gen- 
eral home life of 327 species of birds. As a book for the amateur 
or for the scientific student of bird life in northeastern America it 
is unexcelled. Sent prepaid on receipt of price, $3.50. Address all 
orders to 
ORA WILLIS KNIGHT, 84 Forest Avenue, Bangor, Maine. 
CAMBRIDGE BOTANICAL SUPPLY COMPANY, 
WAVERLEY, MASS. 
BOTANICAL SUPPLIES OF EVERY DESCRIPTION. 
Samples of Driers and Mounting Papers sent on request. 
ASK FOR NEW CATALOG, NO. gr. 
STANDARD MATERIAL, IMMEDIATE SHIPMENT. 
Physiological Instruments. How do Plants Work? 
