below 80 per cent. oil of vitriol, the table only goes to that

NOTE. The specific gravity 1.0553 may indicate either of two solutions of different strengths. To determine whether an acid is stronger than 78 per cent. (the maximum specific gravity) some water is added; if the specific gravity rises it is stronger, if it falls it is weaker than 78 per cent. acid.

This table is by W. A. Davis, in the Journal of Society of

Chemical Industry, 1897, 502.

NITRIC ACID-SPECIFIC GRAVITY AND STRENGTH OF SOLUTIONS AT 。° C.