Chemistry and Physics. 101 
pears that piperidine is an imide ase, or ammonia in which 2 equiva- 
lents of hydrogen are replaced by two equivalents of other radicals. It 
iled with cyanate of potash gives piperidinurea ; the same compoun 
We etained by passing moist chlorid of cyanogen into piperidine. 
: : hae 
destitute of basic Properties. Cahours does not give the composition of 
© other base obtained by him in the distillation of piperine. Its boiling 
Point, 210°, does not correspond with that of picolise.——- Comptes Rendus, 
v, 481, 
oxygen gas, produced by the action of electricity. These results in 
the main confirm those of Schénbein, Marignac, and De la Rive, and 
are as follows : 
Ast. The decomposition of water bythe galvanic battery cannot be 
paccessfully employed to investigate the nature of the so-called zone, 
Pecause the active principle is only produced in very small quantity. 
. ~<- ‘the galvanic are does not appear to modify oxygen, like the or- 
dinary electric spark, because the elevation of temperature probably de- 
Stfoys the effect which the electricity might produce. aaa 
- The sparks produced by means of induced current act, like the 
Sparks fro 
m the common electrical machine. 7 eee. 
re oxygen enclosed in glass tubes with paper dipped in 5 ots 
cl of potassium, can be electrized by a succession of sparks, 
48sing over the external surface of the tube. oe ; 
5th, Oxygen prepared by various methods acquires an odor and very 
marked oxydizing properties when submitted to the action of electricity. 
hese properties are exhibited in oxygen as pure as it can be obtained. 
4th. Py 
and iodid : 
