5 
Of Weights and Measures . 
slight discrepancy between the standards themselves. 
The extent of this difference is about half a grain in 253. 
We have adopted in the following Tables the estima- 
tions given by Sir G. Shuckburgh Evelyn* in the 88th 
vol. of the Philosophical Transactions* corrected in a 
subsequent paper by Mr. Fletcher* in the 4th vol. of the 
Philosophical Journal. On this calculation the cubic 
inch of distilled water at 60° therm, and 29*5 bar. 
weighs 252.506 grains Troy. 
Hence we have the following equations. 
Cubic inch. 
1 ounce Troy of wa-) 
ter at 60° occupies 5 
1.900945 
grs. Troy . 
lb. Troy. lb. Averdu . 
1 Wine pint of wa- ) 7291 ., 1075 
ter weighs 5 
grs. Troy. 
= 1.26581783 = 1.04158725 
lb. Troy. lb. Averdu. 
1 Ale pint of water? 89oa8365 
weighs J 
= 1.545284 = 1.271548 
Wine pint. 
Ale pint. 
1 lb. Troy of water) 7900031 
occupies 5 
= .6471302 
Wine pint . 
Ale pint. 
1 lb. Averdupois of) 960073 
water occupies $ 
=3 .7864429 
We may here notice the very common error of esti- 
mating a wine pint of water to be equal to 16 ounces 
Troy* since it wants as much as 389 grs. of 16 ounces* 
when the cubic inch is estimated at 252.506 grs. and 
37 5 grs. when the cubic inch is reckoned at 253 grs. 
which is the highest estimation. Nevertheless as several 
measuring vessels are thus graduated* and as the adop~ 
tion of this standard would be extremely convenient* this 
measurement may be often usefully employed for mo- 
derate quantities ; but the chemist should then express 
that he uses the pint of 16 ounces Troy. 
