Barometer
Date
27 March 1686
Object type
Archive reference number
Manuscript page number
p331
Material
Dimensions
height (page): 320mm
width (page): 195mm
width (page): 195mm
Subject
Content object
Description
Marginal figure in a letter from Edmond Halley to William Molyneux dated 27 March 1686, where Halley explained Robert Hooke's design for a new barometer.
Transcription
By reason of the Holy days and the unsettled posture the Society was in, there was little done till February 3; when Mr Hooke brought in an Invention of his, for nicely discovering the Alterations of the Air by the Barometer; which I conceive will be much better than any thing else of that kind, the Contrivance thus. AB is as usual in the common wheel Barometer, only from the Ball B goes up a Glass Cane as long as you please according to the proportion of the Diameters of the Ball or rather Cylinder to the Cane: at the Head of which there is a third Ball or Cylinder C equal to the former.
Transcribed by the Making Visible project
Transcribed by the Making Visible project
Related fellows
Edmond Halley (1656 - 1742, British) , Astronomer
William Molyneux (1656 - 1698, British) , Science writer
Robert Hooke (1635 - 1703, British) , Natural philosopher
William Molyneux (1656 - 1698, British) , Science writer
Robert Hooke (1635 - 1703, British) , Natural philosopher
Associated place