pe ENCE 
y XI ‘No. 328. 
Fripay, Aprin 12, 1901. 
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QUEEN PROJECTION CALAN EMIS 
Ee aa e Table and Lantern Work. Scale frame fits the ordinary pro- 
jection Lantern and deflections can be cree 
e Galvan ane Ph BaE 
effe 
Sat aR 
type, sufficiently se ae Thermo 
oan = by volt the og 500, “a8 ts ee sue ae a deflec of one e division. 
ae a ee With key (no ) mounted on Galvanometer ae motio ade ae at. 
PHOTOMETERS—INDUCTION COILS—PHYSICAL APPARATUS 
Apparatus Imported from any Foreign Maker 
QUEEN & CO., Inc 
J. G. GRAY, President 
ELECTRICAL AND SCIENTIFIC INSTRUMENTS 
59 Fifth Avenue, New York 
480 Monon Bldg., Chicago 
1010 Chestnut St., Philadelphia, Pa 
