-------------------+------------------+------------------+
| | Resistance | Mean Temperature |
| Metal. | at 0 deg. C. per | Coefficient |
| | Centimetre-cube | between 0 deg. C.|
| | in C.G.S. Units. | and 100 deg. C. |
+--------------------------+------------------+------------------+
|Silver (electrolytic and | | |
| well annealed)[6] | 1,468 | 0.00400 |
|Copper (electrolytic and | | |
| well annealed)[6] | 1,561 | 0.00428 |
|Gold (annealed) | 2,197 | 0.00377 |
|Aluminium (annealed) | 2,665 | 0.00435 |
|Magnesium (pressed) | 4,355 | 0.00381 |
|Zinc | 5,751 | 0.00406 |
|Nickel (electrolytic)[6] | 6,935 | 0.00618 |
|Iron (annealed) | 9,065 | 0.00625 |
|Cadmium | 10,023 | 0.00419 |
|Palladium | 10,219 | 0.00354 |
|Platinum (annealed) | 10,917 | 0.003669 |
|Tin (pressed) | 13,048 | 0.00440 |
|Thallium (pressed) | 17,633 | 0.00398 |
|Lead (pressed) | 20,380 | 0.00411 |
|Bismuth (electrolytic)[7] | 110,000 | 0.00433 |
+--------------------------+------------------+------------------+

_Resistivity of Mercury._--The volume-resistivity of pure mercury is a
very important electric constant, and since 1880 many of the most
competent experimentalists have directed their attention to the
determination of its value. The experimental process has usually been
to fill a glass tube of known dimensions, having large cup-like
extensions at the ends, with pure mercury, and determine the absolute
resistance of this column of metal. For the practical details of this
method the following references may be consulted:--"The Specific
Resistance of Mercury," Lord Rayleigh and Mrs Sidgwick, _Phil.
Trans._, 1883, part i. p. 173, and R. T. Glazebrook, _Phil. Mag._,
1885, p. 20; "On the Specific Resistance of Mercury," R. T. Glazebrook
and T.