[ Si6 ] 
XXIII. An account of the re-measurement of the cube , cylinder , 
and sphere, used by the late Sir George Shuckburgh Evelyn, 
in his enquiries respecting a standard of weights and measures. 
By Captain Henry Kater, F. R. S. 
Read June 7, 1821. 
The valuable experiments made by the late Sir George 
Shuckburgh Evelyn, for the determination of a standard 
of weights and measures, are detailed in the Philosophical 
Transactions for 1798. It may there be seen that a cube, a 
cylinder, and a sphere of brass were employed, the respective 
dimensions of which being given, as well as the weight of 
water displaced by each, the weight of a cubic inch of distilled 
water might thence be readily ascertained.. 
In reviewing these experiments, so much care appears to 
have been bestowed on those parts of the enquiry which re- 
late to weight, as to leave no reason to doubt their accuracy; 
but as Sir George Shuckburgh has not entered into so full 
a detail of the method he pursued in the measurement of the 
cube, the cylinder, and the sphere, I felt it to be desirable that 
this operation should be repeated, before the Commissioners 
of Weights and Measures should make their final Report. 
The Honourable Charles C. Jenkinson, to whom the 
valuable apparatus of the late Sir George Shuckburgh now 
belongs, very obligingly confided it to the care of the Com- 
missioners. I found the sphere in the most perfect state of 
preservation. The cube and the cylinder were in some parts 
covered with an oxide, which was, however, readily removed 
without their sustaining any injury, by a very weak mixture 
of sulphuric acid and water. 
