The British Association unit of resistance; the resistance of a column
of mercury 1 square millimeter in cross sectional area and 104.9
centimeters long; the B. A. Unit of Resistance.

The Resistance of a circuit expressed in ohms.

The practical unit of resistance; 1E9 C. G. S. electro-magnetic units.
The legal ohm is the resistance of a mercury column 1 square millimeter
in cross-sectional area and 106 centimeters in length. There has been
considerable confusion, owing to inaccuracy in early determinations, in
the valuation of the ohm. In this work the legal ohm is used. The
different ohms [...]

Oerstedt discovered in 1820 that a magnetic needle tended to place
itself at right angles to a current of electricity. This fundamental
experiment is the basis of the galvanometer.

Name proposed for the unit of current strength, but not adopted. The
ampere is the accepted name.

An absorption of gases by metals. Palladium will, if used as the
hydrogen evolving electrode in decomposing water, absorb 980 times its
volume of hydrogen, which is said to be occluded. The metal may also be
heated in hydrogen and allowed to cool therein, when occlusion occurs.
Platinum will occlude 4 times its volume of hydrogen; iron, 4.15 times
its [...]