EXAMINATION OF BITUMINOUS ROAD MATERIALS. 



45 



PLATINUM. 



1 triangle, 5 centimeter sides (10 to 12 grams), or 1 nichrome triangle. 



1 Gooch crucible, as specified (20 to 25 grams) for solubility determinations (may be 

 porcelain). 



1 crucible with tight-fitting, flanged lid (about 25 grams) for fixed carbon determina- 

 tions. 



SOLVENTS AND CHEMICALS 



Carbon disulphide, chemically pure. 



88° Baume paraffin naphtha, distilling between 40° C. and 65° C. 



Carbon tetrachloride, chemically pure. 



Ether (Squibb's). 



Alcohol, absolute (Squibb's). 



Dimethyl sulphate. 



Naphthalene (C. P.). 



Benzophenone (C. P.). 



Cottonseed oil. 



Mercuric chloride or nitrate. 



Mercury. 



Ammonium carbonate (C. P.). 



Calcium chloride, granular for desiccator. 



Asbestos, pure long-fiber amphibole. 



Metric conversion tables. 



