Instruments For Plant Physiologfy 
1884-CAnBOSCO— 1918 
Scientific Instruments for every purpose, designed by Scientists 
Anoxyscopes 
Auxanometers 
Clinostats 
Leaf Clasps 
Hygrometers 
Respirators 
Caloriscopes 
Bell- Jar-Supports, 
—See Bull. 142 
32-27 32-34 
It will cost you Three Cents and One Letter to obtain our Current-Net-Itemized prices, not only upon Physi- 
ological instruments, but upon instruments and supplies of all kinds for Botany, Chemistry, Zoology, Physics, Etc. 
Microscopes and all accessories. Glassware, Porcelain, Hardware, Etc., Etc. In short, full equipment 
for all sciences. 
CAMBRIDGE BOTANICAL SUPPLY COMPANY 
LABORATORY EQUIPMENT 
4 Lexington Street WAVERLEY, MASS. Established 1884 
BOTANICAL SUPPLIES 
During the past year the Marine Biological Laboratory Supply Department 
has sent botanical specimens to Scotland, England, Holland, China and Canada, 
as well as to all parts of the United States. Let us supply you also. 
At the present time the following material can be supplied: 
Marine or fresh water algae, preserved or mounted, or fresh during their 
season; fungi, representing all the important groups, for study or demonstra- 
tion; complete life cycles of four genera of mosses, and sporophytes of several 
more; several genera of ferns; seed plants such as Pine, Zamia, Capsella and 
sometimes Ginkgo and others. 
Sixty or more species of Pure Cultures of Fungi are available. 
During the past year we have worked out and put up in Riker Mounts life 
histories of Pinus, Marchantia, Sphagnum, Zamia and others; also groups of 
Mosses, Liverworts, SHme Moulds, and Lichens. These mounts are of great 
value in the class room as they can be passed around a class without being 
damaged, and with proper care will last for years. 
From October to May the Department makes shipments of live Fucus for 
demonstration of fertihzation. The past fall we have made a number of 
successful shipments as far as the middle west. 
Zoological and Embryological suppHes also furnished. Catalogs of all material 
and other information sent on request. Address all communications to 
GEORGE M. GRAY 
Curator of the Supply Department Woods Hole, Mass., U. S. A. 
Illustrations in Cat. B-91 
and full Descriptions. 
Bull. 142 for recent and 
improved instruments. 
Mailed on request. 
Our illustration shows 
the Cambridge Clino- 
stat, 32-27, revolving 
our Clinostat Rack, 32- 
34, in a study of Geo- 
tropism. 
Always mention the JOURNAL OF BOTANY when answering our -advertisements. 
