or ARTS AND SCIENCES. 225 



It is almost insoluble in water, perhaps a little more soluble in hot 

 than in cold, but it could not be obtained crystallized ; it is readily 

 soluble in dilute nitric acid ; it blackens slightly by exposure to the 

 light, and even at a temperature of 60°. 



Ciipric parabromalphatoluate, Cu (C^H^Br CH.,COO),,was precipi- 

 tated as a flocculent bluish green solid, on mixing cupric sulphate with 

 the amnionic salt. 



0.3028 gr. of the salt gave 0.05028 CuO. 



Required for Cu(r8HeBr.0Jo. Tound. 



Copper 12.90 13.24 



It is insoluble in water, but soluble in dilute hydrochloric acid. 



The baric salt, obtained by neutralizing a solution of the acid with 

 baryta water and evaporating, formed white indistinctly crystalline 

 crusts easily soluble in water. 



The calcic salt obtained in a similar way, and also, although very 

 slowly from calcic carbonate and a solution of the acid, appeared in 

 the form of white warts ; which, under the microscope, were seen to be 

 globular groups of sharp needles looking somewhat like a chestnut- 

 bur ; it was easily soluble in water. 



The behavior of a solution of ammonic parabromalphatoluate with 

 solutions of" the following salts was also observed : — 



Mercurous salts, a heavy flocculent white precipitate. 



Mercuric salts, a slight white precipitate. 



Plumbic salts, a heavy white precipitate, somewhat soluble in boil- 

 ing water, and separating from this solution in crystalline flocks. 



ferric salts, a pale yellow amorphous precipitate, while Chromic, 

 Aluminic, Manganous, Cobaltous, Nickelous, Zincic, and Magnesia 

 salts produced no precipitate. 



Triparabrombenzylamine, ( C^H^Br. CK,).. N, was formed even in the 

 cold, when alcoholic ammonia was added to the parabrombenzyl- 

 bromide ; the white crystals which separated in large quantity were 

 washed with water, and then recrystallized repeatedly from alcohol ; in 

 this way the triparabrombenzylamine was easily separated from its brom- 

 hydrate, which is very slightly soluble even in hot alcohol, and two 

 sorts of crystals of the former substance were obtained, one in irregular 

 somewhat bent thick needles, the other in fan-shaped groups of fine 

 needles, both had the same melting-point, seemed to be about equally 

 soluble in alcohol, and mutually convertible under conditions which 

 could not be determined ; it was therefore assumed that they were 

 identical, and this assumption seems to be confirmed by the following 

 analyses : — 



VOL. XII. (X. S. IV.) 15 



