368 Notices of the Labours of Continental Chemists. 



warmed give off nitrobenzid. The potash salt crystalhzes 

 in acicular crystals, and, by heating gives much nitrobenzid ; 

 the soda salt is deliquescent (Mulder), easily crystallizable 

 (Mitscherlich). The ammonia salt easily loses ammonia and 

 forms a bisalt. The lime salt is acicular, and contains two 

 atoms of water, which are driven off at 190°. The baryta 

 salt loses four atoms of water at 100°. The strontia salt loses 

 two atoms and a half at 1 30°. When acid nitrobenzoate of 

 ammonia is dropped into a solution of sulphate of zinc, a ge- 

 latinous basic salt is formed, the filtered solution gives lamel- 

 lular crystals, C'^ W N' O" + Zn O + 5 Aq. The basic salt 

 contains four atoms of base to one of acid. The manganese 

 salt crystallizes with one atom of water. The copper salt is 

 a blue powder soluble in hot water ; contains one atom of 

 water. There are two salts of lead, a simple benzoenitrate 

 and a benzoenitrate, 5 (C'^H« O' N- + Pb O) + Pb O. The 

 silver salt is partly soluble in water, gives much nitrobenzid 

 when carefully heated, &c. &,c. (Mulder). 



The cinnamonitric acid is formed by adding pulverized cin- 

 namicacid to strong nitric acid ; the temperature must not rise 

 above 60°. The cinnamic acid is at first dissolved, the mix- 

 ture soon becomes hot, and a crystalline substance separates; 

 it is washed with water, dissolved in and crystallized from al- 

 cohol. It is white with a trace of yellow, melts at 270°; 

 heated above 270° it boils and is decomposed. Almost inso- 

 luble in boiling water. At 20° is soluble in 327 parts of al- 

 cohol, and by this property may be easily separated from other 

 acids. Cinnamic acid is soluble in 4*2 parts, benzoic in 1*96, 

 and benzoenitric in somewhat less than its own weight. 



Cinnamonitric acid, when boiled with a small quantity of 

 water, does not form the oily body mentioned above ; is 

 somewhat soluble in boiling hydrochloric acid without de- 

 composition. Its salts with the alkalies are easily soluble; the 

 other salts are either difficultly soluble or insoluble. The 

 potash and soda salts form verrucous crystals ; when an excess 

 of potash is added to the potash salt, prismatic crystals are 

 obtained. The ammonia salt decomposes like the benzoate. 

 Of all the others the magnesia salt is the most soluble. These 

 salts explode. 



The aether is formed by heating cinnamonitric acid with 

 twenty parts of alcohol and a little sulphuric acid for several 

 hours, at a temperature not above 80°. The acid is dissolved, 

 and the fluid when cooled deposits die aether in prismatic 

 crystals ; the aether is not decomposed by ammonia. It 

 melts at 136°, and boils at 300°, at which temperature it is 

 partly decomposed. 



