110 Scientific Intelligence. 
SCIENTIFIC INTELLIGENCE: 
I. Cuemistry anp Puysics. 
ent states of pressure. he apparatus employed consisted of a deli 
cate balance, the beam of which was of class and which gave a a 
ceptible deflection with 0:0001 milligramme ses exam 
n as placed over the two half-armatures of a p — 
electro-magnet and then the attraction or repulsion measured b cae 
of weights placed in. the opposite scale pa e trifling amoun 
magnetism in the glass was exactly compensated by the magnetism : 
the surrounding air. The following were the principal results ob 
(1.) The specific magnetism of oxygen compared with that of iro 
0-003500. 
magnetic gas mechanically mixed with any other indie’ 
gas p es its magnetism whatever be the density of the ape 
only in the neighborhood of the poles there appears to be to @ pe! ss 
extent a separation of the gases which must slightly augment t 
traction of the entire mass. 5 od by 
7.) A magnetic gas which has been for some moments attract 
an electro-magnet is very re: ily repelled if the polarity of es 
net be changed. Hence it appears that gases possess a very di 
. coercive force.—Comptes Rendus, xxxiii, 301; Poge. Ann., lsxxiiiy 
group several were obtained by the author in his previous memo! 
