Glass balls
Date
26 November 1662
Creator
Unknown, Artist
After
Robert Hooke (1635 - 1703, British) , Natural philosopher
Object type
Archive reference number
Manuscript page number
p3
Material
Dimensions
height (page): 293mm
width (page): 184mm
width (page): 184mm
Subject
Content object
Description
Drawing of a double glass ball used by Robert Hooke to prove the compression of air in the internal glass ball. This was reported among other experiments using glass balls to the meeting of the Royal Society on 26 November 1662.
ABC shows a glass ball made of white glass melted in the flame of a lamp and sealed up while the ball was very hot. DFEIK indicates a bolt head cut off at IK to fit in the ball and sealed up with cement afterwards. Water is then poured in between the bolt head and the glass ball until it reaches H. When the top of the glass ball A is broken, the height of the water rises to G (1/8 of an inch), which indicates the measure of the air that was compressed in the glass ball ABC.
The original drawing by Hooke is at Cl.P/20/3/003. Other copies of this image are found in RBO/2i/040, RBO/2ii/044 and MS/776/239.
ABC shows a glass ball made of white glass melted in the flame of a lamp and sealed up while the ball was very hot. DFEIK indicates a bolt head cut off at IK to fit in the ball and sealed up with cement afterwards. Water is then poured in between the bolt head and the glass ball until it reaches H. When the top of the glass ball A is broken, the height of the water rises to G (1/8 of an inch), which indicates the measure of the air that was compressed in the glass ball ABC.
The original drawing by Hooke is at Cl.P/20/3/003. Other copies of this image are found in RBO/2i/040, RBO/2ii/044 and MS/776/239.
Transcription
A Brief Account
The Expts tryed with Glasse-Balls
Transcribed by the Making Visible project
The Expts tryed with Glasse-Balls
Transcribed by the Making Visible project
Object history
26 November 1662, ‘Mr. Hooke brought in his account of the experiments tried with glass-balls’ (Birch 1:127).
Related fellows
Robert Hooke (1635 - 1703, British) , Natural philosopher
Associated place