the letter W (initial of
the word); the C.G.S. unit is the _erg_, which would be written without
abbreviation, on account of its being short; and the practical units
would be the kilogrammeter (_kgm_), the grammeter (_gm_), etc. The
multiples would be the _meg-erg_, the tonne-meter (_t-m_), etc.
Mr. Jamieson's propositions have been in great part approved. Some
criticisms, however, were made during the course of the discussion, and
it is for this reason that the scheme still remains open to improvements.
The proposed symbols are as follows:
A.--PRACTICAL ELECTRIC UNITS.
Total resistance of a circuit. R
Internal resistance of a source of current. r_{1}
Resistance of the separate parts of a current. _r__{1}, _r__{2}, etc.
Specific resistance. [rho]
1 ohm. [omega]
1 megohm. [Omega]
Intensity of a current. C
Magnitude of 1 ampere. A
1 milliampere. [alpha]
Electro-motive force. E
Magnitude of 1 volt. _v_
Capacity. K
Constant of specific induction. [sigma]
1 farad. [Phi]
1 microfarad. [phi]
Quantity of electricity. Q
1 coulomb. C
Electric work (volt coulomb). _v_C
Electric effect (volt ampere, watt in one second). W
Horse power. HP
B.--MAGNETISM.
Pole of magnet pointing toward the north. N
The opposite pole. S
Force of a pole, quantity of magnetism. _m_
Distance of the poles of a magnet. _l_
Magnetic moment. M = _m.l_
Intensity of magnetization. J
Intensity of the horizontal component of terrestrial
magnetism. H
C.--ELECTRIC MEASUREMENTS.
Galvanometer and its resistance. G
Resistance of the shunt of a galvanometer. _s_
Battery and its internal resistance. B
For dynamo machines, the following designations
are proposed:
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