SCIENCE 
New SERIES. SINGLE Coprss, 15 cTs.. 
Vou. VI. No. 145. FRIDAY, OcTOBER 8, 1897. ANNUAL SUBSCRIPTION, $5.00. 
CHEMICAL APPARATUS 
University, College and School Laboratories. 
We carry a full stock of Chemical Apparatus and Analytical Chemicals for Laboratory use. We 
have also a corps of Skilled Glassblowers and are thus enabled to make|Special Apparatus promptly to 
order. Catalogue S of Chemical Apparatus and Catalogue K of Chemicals sent on application. 
We have also very much enlarged and improved our line of Supplies for Use in Physical Labora= 
tories, and are just issuing a New Catalogue of these which we will sendon application. 
QUEEN & CO., Inc., 
MANUFACTURERS OF 
Microscopes, Engineering Instruments, Projection Apparatus, 
Electrical Test Instruments and X=Ray Apparatus. 
New York Office: 116 Fulton St. 1010 CHESTNUT ST., PHILADELPHIA- 
