Chemistry and Physics. 405 
form cyanides of these metals. Zinc is attacked even in the cold 
after several days ; at 100° in three or four hours. Copper and 
seer § 
do not combine directly with cyanogen ‘at any temperature ; 
probably because the temperature ‘of the reaction is also the tem- 
sag of decomposition.— Budi. Soe. Ch., I, xxxili, 2, oe 
ng Dh Cellulose fod its Nitro derivatives—EprER has hae. an 
extended examinatio of the nitro- menue of settle with a 
ee to dete rmine wrlict er they ar bia! gah ethers of nitric 
rT 
derivatives act in the same way as "nitrates ; qk ig eating 
them with sulphuric ace over mercury, they act a # gai ns 
in a cooled mixture of three volumes ‘ee concentrated su 
acid (1°845) and one volume nitric acid (1°5) for ewenty-four 
hours, and after washing and drying, is treated with a mixture of 
three parts of ether and one part of alcohol until ae 
Soluble is removed, there is left a a compound having t mpo- 
sition _ cellulose _hexanitrate, and yielding about 14 mee sane of 
nitro By using less concentrated acids, definite compounds 
were hicaitiot sonpiiniiig less nitryl; the peneeni ete giving 
12°57 per cent nitrogen, the tetranitrate with 11-41, the trinitrate 
with 10°12 per cent (evidently containing tetranitrate) and the 
dinitrate with 6°89 per cent. All ve ese are soluble in a mixture of 
ether and alcohol except the first given, the hexanitrate. The 
mononitrate was not obtained.--Ber. Berl. Chem. Ges., xiii, a 
18 G. F. 
n anew kind of Ammonium Bases.—Grixss has dbsceibae 
@ new series of ammonium bases obtained by acting on the 
Isomeric amidophenols with excess of methyl iodide. When toa 
cold solution of one part of nicthyl todde 3 faded Mit the in 
t 
ole is allowed to a an acid reaction appears after some 
git Jour. nee Vou, XIX, No. 118,—May, 1880, 
