NEW SERIES. SINGLE COPIES, 15 CTS. 
VoL. X. No. 252. FRIDAY, OcTOBER 27, 1899. ANNUAL SUBSCRIPTION, $5.00 
We have just issued a 
NEW CATALOGUE 
OF CHEMICALS 
Listing a complete assortment of ana- 
lytical and commercial chemicals. We 
have on hand a large. 
NEW STOCK 
direct from the best manufacturers, and 
customers can rely on receiving satisfac- 
tory goods. 
LISTS ARE SOLICITED FOR ESTIMATES. 
Orders for educational institutions imported duty free at best 
rates. We also have in stock a full line of 
GRUEBLER STAINS 
in addition to an excellent assortment of the most useful 
anilins direct from the manufacturers. 
Bausch & Lomb Optical Co. 
CHICAGO. ROCHESTER, NEW YORK. 
