350 
MR. H. J. CHANEY’S RE-DETERMINATION OF 
The following are the weights of air displaced by Q (A 2 ’6505) and iv (A 8'4924) 
respectively:— 
Q. w. 
7'3496 gr. 2'2944 gr. 
7-3495 2-2943 
In normal air Q displaces 7*0865 gr. and w displaces 2"2123 gr., whence, in vacuo 
and in normal air respectively, the weight in grains of the sphere would be 
In vacuo. 
Q = 15429-55515 
In normal air. 
15426-95495 gr. 
Weighing of Q in Water. 
Date, 1888. 
Weight of counterpoise w . 
Mean t. 
water. 
Mean t. 
air. 
Barometer 
inches. 
Jan. 3 
Gilt lb. 32 + 4 oz. + 500, 300, 50, 10, and f 
1 grains./ 
49-92 
57°57 
30-82 
„ 4 ... 
Gilt lb. 32 + 4 oz. + 500, 300, 50, 10, and 1 
0\3 grains.J 
62-75 
57-62 
30-75 
„ 5 ... 
Gilt lb. 32 + 4 oz. + 500, 300, 50, 10, 1, -5,1 
0"2, 01 grains.J 
53-03 
57-60 
30-55 
Then at 62° Fahr., B = 30 inches, 
Log vol. Q in grains = 3"7643360, or 
v q = 5812"14 grains. 
The density of the quartz cylinder being :— 
At 62°. 
2-265425 
Therefore, as the cubic contents of Q are equal to 23*04015 cubic inches, the mass 
of one cubic inch at 62 c Fahr. (B. 30 inches) may, by these experiments with Q, be 
taken as 252"261 grains. 
