Instrument to make crystallization with an airpump
Date
8 July 1685
Creator
Unknown, Artist
Object type
Archive reference number
Manuscript page number
p196
Material
Dimensions
height (page): 376mm
width (page): 239mm
width (page): 239mm
Subject
Content object
Description
Drawing of a device with which Denis Papin proposed to make crystallizations in a vacuum. This was presented to the meeting of the Royal Society on 8 July 1685.
AA are two glass vessels held at an obtuse angle by a bent tube BB, which snugly fits into the glass vessels so that air does not escape. One glass is to receive the material to be distilled, and when heated its vapours move into the other glass, leaving the salts to crystalize. DD is the pipe that is connected to the airpump, and is tied with an eel-skin to CC, which is a small pipe soldered onto the middle of BB. The glass vessels exhausted of air are detachable from DD, which makes it portable.
This is copied from RBO/6/250.
AA are two glass vessels held at an obtuse angle by a bent tube BB, which snugly fits into the glass vessels so that air does not escape. One glass is to receive the material to be distilled, and when heated its vapours move into the other glass, leaving the salts to crystalize. DD is the pipe that is connected to the airpump, and is tied with an eel-skin to CC, which is a small pipe soldered onto the middle of BB. The glass vessels exhausted of air are detachable from DD, which makes it portable.
This is copied from RBO/6/250.
Object history
At the meeting of the Royal Society on 8 July 1685, ‘Dr. Papin gave an account, that a solution of sugar had been two days cyrstalling in vacuo by the way proposed at the last meeting, and was not yet fit to be taken out. He proposed another way for a quicker dispatch’ (Birch 4:414).
Related fellows
Denis Papin (1647, French) , Natural philosopher
Associated place