Slide valve models

A set of "Working Models for Engineering Students", showing a variety of different steam engine valves, including:

• Short D slide valve
• Single acting piston valve for steam hammer
• Meyer's variable cutoff valve
• Long D slide valve
• Short D balanced slide valve
• Marine engine piston valve
• Double ported slide valve
• Simple trick valve

Contained in original folder, designed by T & T.G.Jones and published by John Heywood Ltd of Manchester, circa 1905.