I

Chromic acid....... 2.5 parts

Stronger ammonia...   15 parts

Sulphuric acid...... 0.5 part

Cuprammonium solution ...........   30 parts

Fine white paper.... 4 parts

II

Isinglass, a sufficient quantity

Acetic acid......... 1 part

Water............. 7 parts

Dissolve sufficient isinglass in the mixture of acetic acid and water to make a thin mucilage.

One of the solutions is applied to the surface of one sheet of paper and the other to the other sheet, and they are then pressed together.

III

A fair knotting varnish free from surplus oil is by far the best adhesive for fixing labels, especially on metal surfaces. It dries instantly, insuring a speedy job and immediate packing, if needful, without fear of derangement. It has great tenacity, and is not only absolutely damp-proof itself, but is actually repellent of moisture, to which all water pastes are subject. It costs more, but the additional expense is often infinitesimal compared with the pleasure of a satisfactory result.