312 



A. DAIGGER & COMPANY, CHICAGO, U. S. A. 



4238 



4238 WATCH GLASSES, Best glass, well annealed with edges ground and polished, 



for covering beakers, etc. 



Diam., inches 1 l l / 2 2 2*4 2^ %H 3 3J4 3^ 



Per dozen.. $0.20 .25 .28 .50 .55 .60 .70 .75 .80 



Diam., inches 3^ 4 4 1 /. 55^ 6 6# 7 8 9 



Per dozen $0.90 1.00 1.40 1.75 2.00 2.40 2.80 3.00 4.00 6.00 



4239 WATCH GLASSES, with hole in center for use with stirring apparatus, etc. 



Diameter, inches 3 314 4 



E ach $0.20 .25 .35 



4241 WATCH SPRINGS, For burning in oxygen, per dozen $0.40 



WATCH GLASSES, Counterpoised, see under "Balances/' 

 WATCH GLASS CLIPS, see Clamps. 



WATER ANALYSIS APPARATUS 



4252 



4254 



4252 MUENCKE'S DISTILLING APPARATUS, entirely of glass, with ground 



joints, capacity of flask 500 cc., complete $12.50 



4254 APPARATUS FOR DISTILLING, as used by Chicago Board of Health 

 for determination of ammonia, mercury seal. The flash is with 

 inlet for the adding of the permanganate solution after the free 

 ammonia has been distilled off 9.00 



