Note 55 — Chapter XX · SULPHUR, SELENIUM, AND TELLURIUM
George Kamensky translation
Naturally under the condition that there is no other ingredient besides water, which is sufficiently true. For commercial acid, whose specific gravity is usually expressed in degrees of Baumé's hydrometer, we may add that at 15°
Specific gravity 1 1·1 1·2 1·3 1·4 1·5 1·6 1·7 1·8
Degree Baumé 0 13 24 33·3 41·2 48·1 54·1 59·5 64·2
66° Baumé (the strongest commercial acid or oil of vitriol) corresponds to a sp. gr. 1·84.
By employing the second table (by the method of interpolation) the specific gravity, at a given temperature (from 0° to 30°) can be found for any percentage amount of H2SO4, and therefore conversely the percentage of H2SO4 can be found from the specific gravity.