It is also common to speak of the degrees of the acetimeter as proof or over-proof.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley
Every division of the acetimeter (corresponding to ten fluid grains), so emptied, indicates 01 per cent.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley
To ascertain the per-centage of real acid, 5% must therefore be added to the acetimeter number.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley