Steam Engine.

A Pocket-Book of Practical Rules for the Proportions of Modern Engines and Boilers for Land and Marine purposes, by N. P. Burgh, fifth edition, revised, with Appendix, royal 32mo, roan

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Details of High-Pressure Engine, Beam Engine, Condensing, Marine Screw Engines, Oscillating Engines, Valves, etc., Land and Marine Boilers, Proportions of Engines produced by the rules, Proportions of Boilers, etc.

Steep Gradients on Railways.

A Treatise on the Improved Method for overcoming Steep Gradients on Railways, whereby an ordinary locomotive capable of hauling a given load up a gradient 1 in 80, can take the same up 1 in 8, by Henry Handyside, 8vo, sewed

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Strength of Beams.

On the Strength of Beams, Columns, and Arches, considered with a view to deriving methods of ascertaining the practical strength of any given section of Beam, Column, or Arch, in Cast Iron, Wrought Iron, or Steel, by B. Baker, numerous cuts, crown 8vo, cloth

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