'^CT23 1920 ^ 



SCIENCE 



'^oaai Muse^i*^ 



New Series 

 Vol. Ln, No. 1347 



Friday, October 22, 1920 »• 



ti cl Single Copies, 15 Cts. 

 *» « %.^'"'^'^'^ Subscription, S6.00 

 « ir» ^ 



1* "& 



HORTVET CRY01\ OPE 



The most convenient instrui ^ ^or quick, 

 accurate, and economical determination of 

 freezing point. 



Designed originally for determining added 

 water ih milk, and recommended also for com- 

 mercial and research freezing point tests of all 

 kinds. 



The Hortvet Cryoscope is recommended 

 for freezing point tests on the following: 



Acetic Acid; Aniline; Anisaldehyde; 

 Anisol; Benzal chloride; Benzaldehyde; Ben- 

 zene, Benzonitrile; Benzotrichloride; Benzyl- 

 benzoate; Benzyl-bromide; Benzyl-chloride; 

 Benzyl-cyanide; Bromphenol (o) ; Brom- 

 toluene (o) ; Bromoform; Butyric acid (n) ; 

 Cacodyl; Caproic acid; Carbon tetrachloride; 

 Cineole; Cinnamicaldehyde ; Coniine; Cresol; 

 Cyclo-hexane; Dichlor-benzene; Dodecane; 

 Furfural; Glycerine; Linoleic acid; Methyl- 

 salicylate; Methyl-sulfate; Nitro-benzene ; 

 Nitro-glycerine; Nitro-methane; Nitro-toluene; 

 Paraldehyde; Phenylhydrazine ; Piperidine; 

 Propionic acid; Quinoline; Tetramethylben- 

 zene (1, 2, 3, 4,) ; Toluene; Xylene (o) ; Xylene (p) ; Zinz ethyl. 



The Hortvet Cryoscope is recommended also for tests on Bromine; 

 Oils; Antimony penta-chloride; Hydrogen peroxide; Sulfur Trioxide; 

 Stannic chloride; Sulfuric acid; also for aqueous Alcohol solutions; 

 Blood; various Gland secretions;- Salt solutions; Soil extracts; and Sugar 

 solutions; also for obtaining the zero point of precision thermometers; 

 molecular w^eight determinations, etc. 



Km er ^ Amend 



NEW YORK ^^^1^ 



3rd Ave., 18th— 19th St. N{v_jpi' 



PITTSBURGH BRANCH 

 2011 Jackton Arcade 



