Ditto, cloth

1 6

Sulphuric Acid.

The Chemistry of Sulphuric Acid Manufacture, by Henry Arthur Smith, cuts, crown 8vo, cloth

4 6

Surveying.

The Principles and Practice of Engineering, Trigonometrical, Subterraneous, and Marine Surveying, by Charles Bourne, C.E., third edition, numerous plates and woodcuts, 8vo, cloth

5 0

Surveying.

A Practical Treatise on the Science of Land and Engineering Surveying, Levelling, Estimating Quantities, etc., with a general description of the several Instruments required for Surveying, Levelling, Plotting, etc., by H. S. Merrett, 41 fine plates, with illustrations and tables, royal 8vo, cloth, 2nd edition