[ 48 ] 
of comparing different parts of my table of the proportion of 
ftandard in nitrous acid of different fpecific gravities with the 
experiments of Mr. Cavendifh. 
Tuts accurate philofopher found that fpirit of nitre, whofe 
fpecific gravity in temperature 58° is 1,4923, diffolves — of 
b) 
its weight of marble*. Hence 100 parts of it fhould diffolve 
70,42 of marble. Now by my table roo parts of this acid con- 
tain 91,7 parts ftandard, and fince 100 parts ftandard diffolve 
74,4 of marble, 91,7 parts fhould diffolve 68,22; and in this 
manner I have compared the remainder of his refults. 
{Specific Gravity oy | 
100 Parts nitrous! Marble diffolved by|Marble diffolved by 
Acid. Mr. Cavendifh. my Table. 
1,4923 70,42 68,22 
1,437! 58,2 57529 
1,404 5 3,00 52545 
1,4033 53,00 $253 
Tuese differences are very fmall, and may proceed partly 
from the defeéts of the table and partly from the difference of 
the marbles employed; that his marble was fomewhat different 
' from mine appears from this, that his gave but 40,7 per cent. 
of fixed air. 
Ir 
Phil. Tranf. 1783, p- 325, and 1786, p. 245. 
