Just published, 2 vols. medium 8vo, cloth, illustrated by a Steel Portrait, Lithographs, and numerous Wood Engravings, including many accurate Illustrations of Cornwall, its Mines and Mining Machinery, £1 16s.

The Life of Richard Trevithick, Inventor of the High-pressure Steam Engine. By Francis Trevithick, C.E.


Crown 8vo, cloth, 1s.

How to Publish a Book;
Being Directions and Hints to Authors. By Ernest Spon.


Just published, in crown 4to, cloth, with Wood Engravings, 25s.

A Treatise on the Construction and Operation of Wood-working Machines, including a History of the Origin and Progress and Manufacture of Wood-working Machinery. By J. Richards, M.E.