194 CHEMISTRY. 



tion with wood spirit, and repeated crystallizations out of spirits of wine. He finds 

 that it belongs to the family of the glucosides, and by weak acids can be resolved 

 into sugar and Datiscetine which can be obtained in crystals. 



By the action of dilute and strong nitric acid, nitrosalicylic and nitropicric acids 

 are generated. 



The Datisca is used by silk dyers as a dye stuff, and it appears that it would be 

 advantageous to convert the datiscine into datiscetine, in the same way as Leesh- 

 ing strengthens the coloring matters of weld and quercitron. 



PYROXYLINE. 



B6champ has brought forward some further experiments to prove that pyroxyline 

 is of the nature of a nitrate, and does not belong to the nitrobenzine class, inas- 

 much as the latter by alkalies and reducing agents is converted into an azotized 

 body containing all the nitrogen, while nitric ether, the glycerine compounds, and 

 pyroxyline, give nitric acid or different azotized compounds and the original body. 

 He proposes the following formulte for pyroxyline and the other compounds ob- 

 tained by him. 



C2* H' 7 O 17 , 5 N 05, 2 H = pentanitric cellulose, pyroxyline. 



C 2 * H 6 0", 4 N s , H == tetranitric cellulose. 



C 2 * H> 7 O 17 , 3 N s , =- trinitric cellulose. 



C 2* h 20 2u , = cellulose. 



HORDEIC ACID. 



A new acid belonging to the class of the fatty acids, C n H n 0*, has been obtained 

 by Beekmaun, by distilling barley with sulphuric acid : it possesses the usual cha- 

 racters of a fatty acid and has the formula C 24 H 24 4 , and is therefore isomeric 

 with laurostearic acid. 



PIPITZAHOIC ACID. 



Under this barbarous title, Mr. Weld has described an acid obtained from a pur- 

 gative Mexican root, called Raiz del Pipitzahuac. Such a system of nomenclature 

 cannot be sufficiently deprecated ; names of substances obtained from plants or ani- 

 mals should be derived from their scientific denominations, or failing these, from 

 some characteristic property of the bodies themselves. Chemical names are al- 

 ready sufficiently cacophonous without the introduction of the Mexican or the Az- 

 tec. We may probably shortly be treated to a description of the " Pipitzahoate of 

 the oxide of CEthylmethylamylphenylammonium." 



STIBffiTHYLE. 



Merck has examined the action of iodide of stiboathyle upon stiboethyls. He 



has obtained and described the oxide, iodide, bromide, sulphate, carbonate, and 



acetate of stibtriathyle (Sb <E 3 ). The iodide crystallizes well, the rest are 

 amorphous. 



PHOSPHURETTED BASES. 



Hofmann and Cahours have obtained some very interesting compounds by act- 

 ing upon zincoethyle, zincmethyle, and zincamy'.e, with the terchloride of phos- 

 phorus, and also by treating the bodies so obtained with the iodides of oethyle, me- 

 thyle, and amyle. The iodides of these radicals are readily decomposed by the 

 oxide of silver, yielding the oxides which are possessed of strong basic properties. 

 Many of their salts are crystallizable. Similar results were obtained by employing 



