Gramme is the standard unit of French measures of weight, and is the weight of a cubic centimètre of distilled water at 0° Centigrade (corresponding to 32° F.); the other weights have received names corresponding to the number of grammes they contain, or the number of times they are contained in a gramme (see DECIMAL SYSTEM, METRIC SYSTEM). A gramme = 15.43248 grains troy, from which the equivalents in English measure for the other weights can easily be found; thus:
| Grains Troy. | Lib. Avoirdupois. | ||
|---|---|---|---|
| Centigramme | = 1543234 | = .0000220462 | |
| Decigramme | = 1543234 | = .000220462 | |
| GRAMME | = 1543234 | = .00220462 | |
| Decagramme | = 1543234 | = .0220462 | |
| Hectogramme | = 1543234 | = .220462 | |
| Kilogramme | = 1543234 | = 2.20462 | |
| Myriagramme | = 1543234 | = 22.0462 | = .19684 cwt. |
| Quintal (q.v.) | = 1543234 | = 220.462 | = 1.9684 " |
GRAMME-ATOM.—A quantity of an elementary substance, such that the number of grammes-weight is the same as the atomic number of the element—e.g. 12 grammes of carbon (C=12).
GRAMME-EQUIVALENT.—A number of grammes-weight of a substance, elementary or compound, equal numerically to the quantity of that substance which is chemically equivalent to unit weight of hydrogen—e.g. 8 grammes of oxygen, 9 grammes of water.
GRAMME-MOLECULE.—A quantity of a substance, elementary or compound, such that the number of grammes and the molecular weight are numerically the same—e.g. 32 grammes of oxygen (O2=32), 18 grammes of water (H2O=18).