8 
Captain Kater’s account of the 
From Sir George Shuckburgh’s data, and the before- 
mentioned measurements of the cube, cylinder and sphere, 
the Commissioners of Weights and Measures determined the 
weight of a cubic inch of distilled water, weighed in air by 
brass weights at the temperature of 62 0 of Fahrenheit's 
thermometer, the barometer being at 30 inches, to be equal 
to two hundred and fifty-two grains, and four hundred and 
fifty-eight thousandth parts of a grain, of which the Imperial 
Standard Troy pound contains five thousand seven hundred and 
sixty ; and also that the avoirdupois pound, which has long 
been in general use, though not established by any act of the 
Legislature, is so nearly seven thousand grains, that they 
recommended that seven thousand of such troy grains be 
declared to constitute a pound avoirdupois.* 
The Commissioners of Weights and Measures also recom- 
mended that the gallon measure should in future be that 
which contains ten pounds avoirdupois of water in ordinary 
circumstances (that is to say, the temperature of the water 
being 6 2® of Fahrenheit's thermometer, and the barometer 
30 inches) ; and this, under the denomination of “ the Impe- 
rial Standard Gallon,” was declared to be the unit and only 
standard measure of capacity, and that eight such gallons 
should be a Bushel. 
The Act for “ ascertaining and establishing uniformity of 
“ Weights and Measures” having been passed by Parliament, 
to the effect before-mentioned, the Lords Commissioners of 
His Majesty’s Treasury expressed their hope, that some of 
* For the manner in which the weight of a cubic inch of distilled water was 
deduced, see the Appendix to the Third Report of the Commissioners of Weights 
and Measures. 
