IV 



SCIENCE-ADVERTISEMENTS 



Specialties For 

 Metallurgical Laboratories 



IN OUR STOCK FOR IMMEDIATE SHIPMENT 



DIMETHYLGLYOXIME 



For Nickel Determination 



PHENYLHYDRAZINE 

 HYDROCHLORIDE 



For the Determination of Alumina in 

 Titaniferous Iron Ores. 



CINCHONINE 



For the Determination of Minute 

 Percentages of Bismuth 



POTASSIUM 

 PERMANGANATE 



AMMONIUM 

 PERSULPHATE 



MOLYBDIC ACID, 85% 



CASSEROLES 



OF 



"S. C. p." JAPANESE PORCELAIN 



For Silica Determination. 



210 cc. 

 375 cc. 

 750 cc. 



Generally considered to be superior to 



any other make now available for 



this important test. 



VANIER COMBINED 



POTASH BULB AND 



DRYING TUBE 



Patented July 30, 1912, Patent No. 1034170 



For the Absorption of CO2 in the De- 

 termination of Carbon in Steel by 

 the Direct Combustion Method. 



We are the Sole Licensees under the 

 Vanier patent and any bulb which 

 does not bear the U. 5. patent number 

 and date and the name, "Arthur H. 

 Thomas Company" is an infringement. 



ARTHUR H. THOMAS COMPANY 



IMPORTERS — DEALERS — EXPORTERS 



LABORATORY APPARATUS AND REAGENTS 



WEST WASHINGTON SQUARE PHILADELPHIA, U. S. A. 



