ooodio 
0 00/ a 2 % 
'00 74*1 7 . 
■oh \o 
9 - 4 - fa b 
”2 q J 
■ cq . / 
*54< Sir George Shuckburgh Evelyn’s Endeavours 
After this experiment, I discovered that some small bubbles 
of air had insinuated themselves between the cylinder and the 
Table I. Shewing the expansion of cast brass, both in length and solidity, and also of 
water, in solidity, by the effect of heat : the former is derived from Mr. S.w eaton’s 
experiments ; (Phil. Trans. Vol. XLVII1.) and the latter from some of my own, when 
1 was a resident member of the University of Oxford. 
Degrees 
Expansion of Brass. 
Expansion of W ater. 
of Heat. 
In Length. 
In solidity. 
In solidity. 
O 
Millionth Parts. 
Millionth Parts. 
Millionth Parts. 
I 
I 
3 
i6 5 
2 
2 
6 
33 o 
3 
3 
9 
495 
4 
4 
1 2 
600 
5 
5,2 
16 
825 
6 
6 
l 9 
990 
7 
7 
22 
“55 
8 
8 
2 5 
1320 
9 
9 
28 
14S5 
10 
10,4 
3 3 
1650 
Table IT. Shewing the Correction for 
the Wires, or the Diminution of the 
Weight of the Water-Scales, by Im- 
. mersion in Water. 
Table III. Shewing the Correction of the 
Weight of the Sphere in Air, on Account 
of the Weight, or Heat, of the Atmo- 
sphere. 
1 
J { 
Bylmmer- 
sion in Wa- 
ter. 
The 4 Wires 
of the Cube, or 
Cylinder. 
The 3 Wires 
of the Sphere 
lose 
Inches. 
Grains. 
Grains. 
'Q 0 O/?$$ Z 
I 
— °>°35 
— , 0,078 
'COO 3 fi 4 
2 
— 0,071 
-0,157 
'COO $ 3.7 j 
3 
— 0,106 
— 0,235 
' 0 4 7 7 / 7 S' 
4 
— 0,142 
— °> 3 J 4 
•O'O. ■ 
5 
— 0,177 
— 0,392 
QO/o- 
6 
— 0,212 
— 0,471 
'Oo / - •- • 
7 
— 0,248 
— 0,549 
■ 00/4 3 S & 
8 
— 0,283 
— 0,628 
" 00 / Si 3 A 
9 
- 0,319 
— 0,706 
'00/704 z ■ 
10 
— °>354 
-0,785 
■ X 03 S 7 S - 4 
20 
— 0,708 
- 1. 57 ° 
Barometer 
Correction. 
Therm. 
Correction. 
Inch, y 0 • 
Grains. 
O 
Grains. 
2 9*5 
0,00 
5 ° 
0,00 
1 
— ,12 
1 
+ 0,10 
t ft I- ;'; W 
2 
> 2 3 
2 
0,20 
• e < d -2 y . 
3 
>35 
3 
0,30 
' Coo 8 . 
4 
>47 
4 
0,40 
7 OO/OJ , 
5 
>53 
5 
0,50 
WO /3 2 - 2 
6 
>70 
6 
0,60 
' aoiG 
7 
,82 
1 
* / 
0,70 
’ 07/3 7 
8 
>94 
8 
0,80 
' 002 /? 
9 
1,05 
9 
0,90 
A 
10 
Ui 7 
10 
1,00 
N. B. If the barometer is below tg- 
5 inches, or the 
thermometer below 50°, 
use the contrary signs. 
O 
' 0 MZ 2 
'0004.?. 
' o oodd 
' 00/37 
* . i /I rOO 
•G-C / fr -* 
XWL&Q 
'. 0020 $). 
'0012 8 | 
• 0 / 40 8 
If. B. 8o inches in length, of the wires') grs. 
for the scales for the cube and cylin- ^6,16 
7 f der weigh - - - j 
therefore 1 inch will be ,077 grain, ? „ 
and 4 wires of t inch/ ! $ = 0>3 ° 8 
Also, Qi inches of the wire for the ) 
c • u r =20,71 
sphere weigh - - 5 ' 
and 1 inch = 0,227, and 3 wires of? co 
1 inch - - - $ *= °> 68 3 
and the specific gravity of the wire is = 8,7 
Water being taken as heavier than air, as 836 : t, (see 
Observations in Savoy, Phil. Trans, for 1777,) the 
barometer being at 29,27, and thermometer 5 1 °, a 
sphere of air equal in bulk to the brass sphere, viz. 
= 1 13^ cubic inches, would weigh, when thebarom. 
was 29,5 inch, and the therm. 50 0 =: 34,57 grains ; 
and 1 cubic inch of such air - = 0,304 
This correction will serve for any other body whose 
bulk is known. 
<o?' ■ 
-82 $773 
- - * •QQtthi 
