174 6ti? A George Shuckburgh Evelyn’s Endeavours 
9 
,A 
JO 
34 C 
3 4 Q 0 1 - 
- J 
n 
43 * n 4 / •-! 3 
73’// 7 37 ■ ? 
„ : ;y • 0000 3 *&8 ■ 
.£ 
7 
The two-pounds weight, from the 
House of Commons, kept in a 
deal box, marked A 
>— 11527,84 
A duplicate of the last mentioned 2 lb. 
weight, preserved in a deal box, 
marked B 
The thermometer now stood at 68° 
Tjoughton’s Weights. 
grains- grains. 
IOOOO 1 
I 
IOOO 
400 
:<( lOO 
20 
7 
L 0,84 
" IOOOO 
IOOO 
400 
'< 100 1 *527,55 
20 
7 
°>55_ 
Therefore the mean weight of 2 lb. Troy, from the! 
two last trials, is - - j 11 5 ‘ 2 7 ’ 7 ° 
And consequently 1 lb. becomes - - - 5763,85 
But, from the examination of the two single pound"! 
weights, as above, 1 pound is j 7 1 
Therefore the mean of all is - - — 5763,78 
That is, Mr. Troughton’s weights are too light by 0,6562 
grain on 1000 grains, or 1 in 1523,92 grains. 
(§. 42.) I11 conclusion, it appears then that the difference of 
the length of two pendulums, such as Mr. Whitehurst used, 
vibrating 42 and 84 times in a minute of mean time, in the la- 
titude of London, at 113 feet above the level of the sea, in the 
temperature of 6o°,and the barometer at 30 inches, is = 59,89358 
inches of the parliamentary standard ; from whence all the mea- 
sures of superficies and capacity are deducible. 
That, agreeably to the same scale of inches, a cubic inch of 
pure distilled water, when the barometer is 29,74 inches, and 
