Chemistry and Physics. 465 
Hydrocarbons, Aldehydes, Hydrocarbons. 
OH, me) 
CH,.C 
CH,.CH ; CH,.CH,O 2 
C,H,CH, «Lia C,H, .CH,O cH OH Got, tit 
C.H,CH, C,H, .CH,O 6 
Hydrocarbons. Carbonyles. 
aldehydes or acetones. CH, | — Core 
CH, .CO.CH, 0,1, CH, [= Car; Col 
C,H, -CO.C,H, © C,H, . CH, yield { C,H, . COf= 
6-H, 0O.C H.C A= On Te C,H 2: Copa 
©; HCH, C1 ,H,.CO 
author gives in conclusion the evidence that camphor itself 
alongs to this class of poses and says that had he not peetaied 
to found a new class of bodies on a single compound, he would 
ong ago aa roposed to ciate camphor as a aut g e.— 
Bull. Soc hh xxiii, 146, Feb., 1875 
aan of Hydroaylamine by the reduction of ° Dinitro- 
compounds.— Whenever a nitro-organic derivative, in which but a 
Ow 
g o) 
mented to picatiaga kee would be the result on reduction if tw 
such groups were so united. For this purpose they selected the 
divitropropane CH,---C(NO,),—--CH, recently discovered by 
them, and introduced it into difute hydrochloric acid containing 
metallic tin. In a short time the Mavs Ste had disappeared, 
and the solution, after removal of the tin by hydrogen sulphide, 
afforded on evaporation pure aa ea at hydrochloride. The 
organic reduction-product was acetone, so that the reaction is 
as follows: CH,—--~C(NO,),—--CH »+H,=CH, -.-CO-.-CH, 
(NH,O), +H, O. EthyLnitrolic acid reacts similarly, yielding 
nearly the theoretic quantity. Nitroform, however, combines 
both reactions, yielding beside hydroxylamine, hydrogen SyanIe, 
and ammonia.— Ber. Berl. Chem. Ges., viii, 215, March, hy 
“ = 
8. Viscosity of Gases.—Capt. A, von Gonteucen es com- 
pared the previous determinations of this quantity, and states that 
of the two hypotheses from which the dynamical theory of gases 
start, the older gives the co-efficient of fricti , 7 
tional to the square root, the newer (Maxwell’s) gives it prnece: 
tional to the first power of the absolute temper: F 
found experimentally the power 1, O. E. Mayer the mney “| 
experiments on capillary tubes O. E. Mayer found the power i, 
Puluj the power $ of the absolute temperature 
or the more certain determination of this ratio, experiments on 
currents see four capillaries of glass and one of brass were 
undertaken; and together with the temperature of the room Gan 
of boiling siee congealing paraffin, and a mixture of salt and 
