SCIENC 
NEw SERIES. 
Vou. VI. No. 141. FRIDAY, SEPTEMBER 10, 1897. Enda Soe eee $5.00. 
PHYSICAL APPARATUS 
FOR 
University, College and School Laboratories. 
Hak 
We carry constantly in stock a complete line of Physical Apparatus, both for Demonstration and 
Student’s Use. Much of this is of recent design. Our line of Electrical Test Instruments for 
Student’s Use is particularly complete. 
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 send on 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. 
