1851 Great Exhibition: Official Catalogue: Class VI.: John Dawson
From Graces Guide
612. DAWSON, JOHN, Distiller, Green Park, Linlithgow — Inventor.
New distiller or rectifier's recording close safe, for the purpose of protecting from fraud and dishonesty the process of distillation. It is close in all its parts, and covered with plate glass; it is accessible for samples at all stages of the process of distillation; but no quantity of spirit can be drawn unrecorded. The mechanism is composed of gauges, valves, and fixed and movable conduits acted on by horizontal and vertical rods, by means of which the safe can be applied to any method of distillation, or to any number of stills.
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