404 Scientific Intelligence. 
nature of the metal which constitutes the internal surface of the 
surrounding vessel.— Comptes Rendus, No. 10, March 9, 1885, pp. 
735-737. Fe 
9. Measurement of Magnetic Force by hydrostatic pressure.— 
Magnetic fluids under the influence of magnetic force show a pres- 
sure perpendicular to the magnetic lines of force, which 1s ex- 
pressed by the equation p=,’ in which H is the strength 
of the magnetic field, and K is a diamag 
netic constant. The dia- 
magnetic constant for atmospheric air is e 
n a magnetic 
in the fluid and the air can be balanced by a hydrostatic pressure 
and can be measured by K—1. G. Quincke contributes a volumr 
nous article on measurements of this character to the Annalen der 
Physik. The paper contains many tables of the results of meas- 
urement. The paper also contains tables of the quantity which 
G. Wiedemann has termed Atom Magnetism.—Ann. der Physt 
und Chemie. No. 3, 1885, pp. 347-416. ae a 
10. 
horizon, M. H. Moriee has employed a selenium cell similar to 
that invented by Mr. Graham Bell. Thirty-eight dises of copper 
this Journal, xx, 124; xxi, 99). » Experiments were also made PY 
the party at Kagoshima on their way to Naha. 1 
tained in ¢.g.s. units, as the mean of independent series with two 
pendulnums were: 
For Naha, =979+165 + 00055 
or Kagoshima, abthad pitt 
Both values are somewhat greater than those deduced from the usual 
formula. Mendenhall obtained for Tokio g=979'°854.0°0044. 
