Pe ae ee ee ee See te 
The undersigned wishes to exchange his herbarium of 
about 5000 species of North American flowering plants for 
Graminez from all parts of the world. 
Aes tid CHCOCK, 
Manhattan, Kansas. 
Henry Heil Chemical Co., 
or. LOUIS, Mo. 
themicals and Apparatus 
LABORATORY 
SUPPLIES, 
GIVE USA TRIAL. YOU WILL FIND US PROMPT AND CHEAP 
Before Ordering Elsewhere, Get Our Quotations. 
Large Illustrated Catalogue assis ation, 
BAUSCH & LOMB OPTICAL C0., 
Microscopes & 
sme seCessories, 
ene weToNE Microtomes, 
NAY Sect iae Photo Lenses 
FACTORY AND ren ie, | amniutter S- 
aE bottoay N.Y. 
