L a y 
221,76 parts of the ftrongeft acid, therefore 288 grs. of oil of 
vitriol, whofe fpecific gravity is 1,7881, contain 221,76 grs. of the 
ftrongeft acid, that is 77 per cent.. I do not know at what tem- 
perature the fpecific gravity was taken, but fhall fuppofe it to be 
at 15° of Reaumur, as is very ufual in France, that is 65,°75 of 
Farenheit, its fpecific gravity would then be 1,7917, at the 
temperature of 60°, for which my table was formed, and confe- 
quently fhould contain 83,6 grs. of ftandard. Now 77 grs. of the 
ftrongeft acid are equivalent to 86,4 ftandard, for 82.92::77.86,4, 
therefore the difference of Mr. Berthollet’s refult and that afforded 
by my table is only 2,8 grs. and if the chance of an error 
in both our refults be equal, the difference will be only 
1,4 gr. 
I must not diffemble however that there is an experiment of 
Mr. Morveau’s totally irreconcileable with my table*: He took 
58 grs. of vitriolic acid, whofe {pecific gravity in the temperature 
of 8,5 of Reaumur, equal 51°,12 of Farenheit, was 1,841, and 
dropped into it a folution of acetous barofelinite; he found the 
precipitate, after calcination in a red heat for half an hour, to 
weigh only 110,3 grs. which according to Bergman indicates 16,54 
of the ftrongeft vitriolic acid in the 58 grs. of the oil of vitriol; 
and if 58 contain but 16,54, 1oogrs. of this oil of vitriol 
fhould contain but 28,5 of the ftrongeft acid, or 32 of 
ftandard. 
Tuts 
* Encycloped. p. 592: 
