mA ENC 
Fripay, Aprit 19, 1901. 
ANNUAL SUBSCRIPTION, $5.00. 
SINGLE CopiEs, 15 crs. 
NEW SERIES. 
VoL. XIII. No. 329. 
Sole Agents for 
Schott 8z Gen. Jena Laboratory Glassware 
The very best Glass for Laboratory use. 
Kahlbaum’s C. P. Chemicals and Reagents 
Kavalier’s Bohemian, Greiner & Friederich’s German Glassware, 
CARL ZEISS’ MICROSCOPES, ETC. 
ical Apparatus 
siadedioyty *q 5 S JOYS 2 JoyoaTYIS rey 
"aya ‘sadoospiejog jyosueepy 2p ypwuyIS zueLy 
snyeseddy jessAyg p2UMoueary-pjso A\ S JUS XeTAy 
JO} sjuasy7 2J0S 
Chemicals and Chem 
NEW AUTOMATIC AGATE MORTAR GRINDER 
Very useful and practical for Grinding Minerals, Chemicals, etc., to finest powder for Analytical purposes, 
New York 
181H STREET and 
9 THIRD AVENUE 
EIMER & AMEND 
