Device to crystallize liquids using the airpump
Date
1 July 1685
Creator
Unknown, Artist
Object type
Archive reference number
Manuscript page number
p195
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 at the meeting on 1 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/6/248.
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/6/248.
Object history
At the meeting of the Royal Society on 1 July 1685, ‘Dr. Papin [...] proposed a way for making crystallisations in vacuo by joining two cylindrical vessels (one that contained the liquor to be cristallised, the other empty) in an obtuse angle; by which means when the vessels are exhausted, the vapours may easily pass out of the vessel of liquor made more hot into the empty vessel, which is cool, and make way for the salts to crystallise' (Birch 4:413).
Printed in Denis Papin, A continuation of the new digester of bones (London: J. Streater, 1687), fig. 18.
Printed in Denis Papin, A continuation of the new digester of bones (London: J. Streater, 1687), fig. 18.
Related fellows
Denis Papin (1647, French) , Natural philosopher
Associated place