SCIENCE 



New Series 

 Vol. LVI, No. 1447 



Friday, September 22, 1922 



Anntjal Subscsiption, $6.00 

 Single Copies, 15 Crs. 



unsen Syphon 

 Barometer 



1) 



Glass Blown Apparatus 



For the past 50 years our shops have been recognized 

 as National Headquarters for glass blown laboratory 

 apparaltus of all kinds. We are prepared to supply all 

 regular forms promptly from stock. Special apparatus 

 according to blue print can usually be supplied in from 

 four to ten days. Particular attention is directed to the 

 following items; numbers refer ito our "AA" catalog: 



550 Bunsen Syphon Barometer, graduated in mm. (See Cut) 



1 080 Picnometer with thermometer and stoppered capillary 



tube. 



1271/2 Fleming Mercury Sealed Absorption Bulb. 



1273/2 Fisher Absorption Bottle. 



1 3 1 8 — Burettes with Geissler stopcocks according to the speci- 

 fications of the Bureau of Standards. (See Cut). 



1350 — Morse Calibrating Burette, set of 3. 



2249 Kobe Condenser, triple walls, gives large cooling sur- 

 face. 



2731/10 Mercury Purifying Funnel. (See Cut). 



2796 — Soxhlet Extraction Apparatus. On special order, made 

 of Pyrex glass. This makes the apparatus much more 

 durable. 



3500 Regular Orsat Gas Apparatus, also special beams, col- 

 lection tubes, etc. 



3958 Brix hydrometer with thermometer for sugar testing. 



We make also hydrometers for testing gasoline and 

 other oils, as well as for many other special purposes. 



4754 — DuPont Nitrometer Outfit. 



5202 Freas Conductivity Cell. 



5985 — Pyrex Retorts, glass stoppered. Made now in sizes up 

 to 12000 cc. Useful for many purposes. 



653] Apparatus for determining sulfur in oils, A. S. T. M. 



method. 

 7249/3 — Van Slyke CO2 Apparatus. (See Cut). 



We make many other forms of apparatus. Full details of any 

 form of apparatus gladly sent on request. 



■ITTlEr 



■FOUNOEOI 



NEW YORK CITY 

 3rcl Ave., 18th — 19th St. 



ESTABLISHED 



mend 



B5 I K^HOM 

 PITTSBURGH BRANCH 

 4048 Jenkins Arcade 



1851 



Headquarters for Laboratory Appairatus and Chemicals 



