Portable barometer and a device to measure the height of mercury
Date
6 December 1697
Creator
Unknown, Artist
Object type
Archive reference number
Manuscript page number
p4
Material
Dimensions
height (page): 135mm
width (page): 180mm
width (page): 180mm
Subject
Content object
Description
The design on the left is one of a portable barometer, from a letter from William Derham to Hans Sloane dated 6 December 1697. A.A.A.A. indicates a tripod; B.B.B. the frame or case with the barometer and cistern in it, represented by dotted (‘pricked’) lines; C.C. the weather-plates.
The drawing on the right, shown to Derham by a friend, is of a glass tube, bent diagonally to make fine measurements of the height of the mercury in the barometer.
Both figures were printed with Derham's letter in Philosophical Transactions of the Royal Society, vol. 20, no. 236 (1698).
The drawing on the right, shown to Derham by a friend, is of a glass tube, bent diagonally to make fine measurements of the height of the mercury in the barometer.
Both figures were printed with Derham's letter in Philosophical Transactions of the Royal Society, vol. 20, no. 236 (1698).
Object history
Printed in W. Derham, ‘Giving an Account of Some Experiments about the Height of the Mercury in the Barometer, at Top and Bottom of the Monument: and about Portable Barometers’, Phil. Trans. vol. 20, no. 236 (January 1698), pp. 2-4, figs 9 & 10.
Related fellows
Associated place