Sir George Shuckburgh Evelyn's Endeavours 
(§. 24.) A Synopsis of the preceding Experiments. 
7 tit 
079 
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Contents (true to T oloo) * n inches 
Weight in air, true to 0,02 grain 
Weight in water, true to 0,10 grain 
Weight of an equal bulk of water, 
true to a,i2 grain, or T 7 55 o 
Weight of a cubic inch of water, 
from these experiments 
} 
Cube. 
Therm . 
Cylinder. 
Therm. 
Barom. 
Inches. 
O 
O 
Inches. 
I 24,18917 
6 l 
74,94826 
62 
grains. 
32084,82 
62 
21560,05 
62 
29,00 
703,03 
60,2 
2553,22 
60,5 
29*47 
3 * 3* l >79 
19006,83 
252,694 
253,600 * 
A 
jy 04 
The diversity in the result of these two experiments is de- 
serving of notice, and must be explained. It may proceed from 
two causes, which we will now inquire into. But first it may 
be observed, that the accuracy in measuring the dimensions of 
these two bodies, as well as the precision in weighing them, 
has, I think, been such as to put out of all doubt this part of 
fhe experiment. From whence then does this difference arise? 
Either of two causes may be suspected ; viz. the pressure of 
the water against the sides of these two bodies altering their 
volumes, which, it may be presumed, would have a greater ef- 
fect on the cube, from its figure, than on the cylinder, and In 
a direction agreeable to this difference; that is, It would dimi- 
nish the capacity of the cube more than that of the cylinder, 
and thus make the apparent weight of a cubic inch less in the 
experiment of the cube. But also we see, that the cylinder was 
* The weight of a cubic inch, of common or rain water has been reckoned 
about 253 grains, sometimes — 253*33 grains, at others 253,18. But authors do not 
seem to have agreed in what they meant by common water, rain water, pump water, 
spring" water, and distilled water ; for occasionally they are all confounded, and made 
to pass for each other; and sufficient notice seems not to have been taken of the 
temperature to which these weights were assigned. See Martin’s Pbilosopbia Bri - 
tannica. Lewis’s Philosophical Commerce of Arts. Chambers s Dictionary, by Ds\ 
Rees. & c . & c . 
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