Driver's brake valve with feed valve. Secti

Coloured sectional drawing, scale 1:2, of Cockburn's Deadweight Safety Valve, 1924.

Ros 'pop' safety valve, c 1904. This is a

Muffled 'pop' safety valve, c 1875. Section

'How to build a two valve set', No 23, Godfrey Philips cigarette card, 1925.

Sectioned railway locomotive, 1840-1845.

Daimler-Knight four-cylinder engine, 1909.

'Single Acting Piston Valve for Steam Hammer', 1905.

Ford Model T motor car engine, 1920.

Humber four-cylinder 16 hp motor car engine, 1911.

The production line in a brewery, late 18th century.

A standard railway locomotive of 1845.