SPENCER MICROSCOPE 
No. 64D 
WITH SIDE-FINE ADJUSTMENT 
(LEVER TYPE.) 
Embodies all of the very best and latest features in 
microscope construction, including a side fine adjustment, 
the construction of which is mechanically of the highest 
efficiency and durability, arrived at after more than ten 
years experience in building side fine adjustments. 
It is exceedingly simple, containing fewer parts than 
any other type of fine adjustment and thus less likely to get 
out of order. We guarantee it to give no lost motion or 
side thrust and to last the life of the instrument. 
Equipped with double nose piece, 16 mm. and 4 mm. 
objectives, 6x and lOx oculars, iris diaphragm complete 
in Cabinet, $33.00. 
Discount to Schools — Catalog Free 
SPENCER LENS COMPANY, = BUFFALO, N. Y. 
Clarke Memoir Paper 
A Permanent Record Paper with Half Tone 
and Color Printing Qualities 
CLARKE & COMPANY 
7n Brunswick Building 225 Fifth Avenue 
NEW YORK 
Always mention the JOURNAL OF BOTANY when answering our advertisements. 
