SCIENCE 
ae Frrpay, SEPTEMBER 15, 1899. 
Chemical aw Chemical ian 
Carl Zeiss’ and Spencer Lens Co.’s 
Microscopes and Accessories 
DR. PFUNGST’S DIGESTER 
OF ALUMINUM BRONZE 
MAX KOHL, PHYSICAL APPARATUS 
STVOIANEHD daNd SANNVETHVA “dV ‘D 
FIMER & AMEND, New York 
