Patent Model - Improvement in Stills for Petroleum, &c.

Maker and role
John Gracie, Patentee
Charles Lockhart, Patentee
Production date
Nov 17 1863
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Object detail

Brass, paint, tin
7 1/2 x 8" (19.1 x 20.3cm)
Gracie and Lockhart's invention relates, "first, to a means for taking off vapor from the still at the same height from the surface of the oil and at different heights during the process of distillation; second, to a means for keeping the bottom of the still clean or free from incrustation." (Patent Number 40,632)
Object number
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