214 PROCEEDINGS OF THE AMERICAN ACADEMY 



it by heating the acetate with alcoholic potassic hydrate in a sealed 

 tube, and by boiling the bromide with water for two days ; and found 

 that the products of all these methods melted at the same point (80°), 

 so there can be no doubt that this is the true melting-point of the 

 alcohol. An analysis of the substance made by the first method gave 

 the following results : — 



0.5543 gr. of substance dried in vacuo gave on combustion 0.9131 gr. 

 C0 2 and 0.1990 gr. H 2 0. 



0.3480 gr. gave, by the method of Carius, 0.3498 AgBr. 



Calculated for C 7 H 6 BrOH. Found. 



Carbon 44.92 44.94 



Hydrogen 3.74 3.99 



Bromine 42.79 42.78 



Properties. Slightly flattened white needles, sometimes 5 cm. long, 

 when crystallized from boiling water, from ligroine needles grouped 

 in sheaves, with but little odor, which melt at 80°, sublime in oily 

 drops, and distil with steam very easily. It is very slightly soluble in 

 cold, much more so in hot water or ligroine, and freely in alcohol, 

 ether, benzol, glacial acetic acid, and carbonic disulphide. It can be 

 most conveniently purified by crystallization from hot ligroine. Oxi- 

 dized with potassic permanganate, it gave orthobrombenzoic acid, 

 melting point 147°-148°. 



The Ortliobrombenzylcyanide, prepared by boiling alcoholic potassic 

 cyanide with the bromide, was a dark-colored oil, which did not 

 solidify in a freezing mixture, and seemed to be decomposed by distil- 

 lation ; we therefore did not attempt to purify and analyze it. 



The Orihobromalphatoluylic Acid, CT^BrCHoCOOH, was made 

 from the cyanide by heating it with strong hydrochloric acid to 130° 

 in a sealed tube. The product was purified by conversion into the 

 ammonium salt, and recrystallization from water or alcohol of the acid 

 set free from this by dilute sulphuric acid. 



It forms white pearly plates, or flattened needles, melting at 

 102^°-103° ; but little soluble in cold, more so in hot water, freely 

 in alcohol, ether, benzol, glacial acetic acid, and carbonic disulphide. 

 It is only sparingly soluble in cold ligroine, but very soluble in hot, 

 from which it crystallizes in small needles arranged in fan-shaped 

 groups. 



Argentic Orthobromalphatoluylate, C H 4 BrCH 2 COOAg, made from 

 the acid by adding amnionic hydrate, driving off the excess of ammonia 

 on the water-bath, and precipitating with argentic nitrate, formed a 



