Chemistry and Physics. 67 
word for the manufacture of gunpowder. This charcoal therefore 
was 
ap ‘*e 
5. On the Substitution derivatives of Nitrogen trichloride. — 
Konter has investigated the bodies discovered by Wurtz and 
considered by him derivatives of nitrogen trichloride. Tschermak 
first established the correctness of this supposition by acting on 
dichlorethylamine with zinc-ethyl and obtaining triethylamine. 
e author has confirmed these results and has produced the 
responding methyl compound, apconigpe ee agen N.CH,.C 
It is a gold-yellow liquid, irritating to the i boiling aire 
59° and 60° , and quite permanent. Kohler hopes by its means to 
produce the azo-compounds of the fatty series, by a reaction 
analogous to that by which phosphobenzene is produced from 
phosphenyl chloride and .phenylphosphine.— Ber. ae fh stenen 
és., xii, 770, May, 1 
On 't Prepar ation ‘of a9 Cuprous c. — _The dificul- 
acid, while the cuprous chloride itself is only di tly solu lein 
this liquid, has suggested a new method of orice aration. By 
passing SO, gas into a mixture of —_s molecules salt and copper 
— itat 
pera Thus made, it is ure white powder composed of 
boring” tetrahedrons upon isch strong sunlight has no action. 
Strong sulphuric acid scarcely acts on it. In the dark, dilute 
nitric acid is also without action ; but when suspended in nitric 
acid diluted with six parts of water, the euprous chloride is 
ana sensitive to light, the crystals becoming black 
Ges. sth 
7. On the Donpeaniont "Wood. -Tnouses, sioticing ‘ies con- 
siderable quantity of extract yielded to dilute sodium hydrate 
solution by birch wood, which extract was precipitated again 
