ae yar 
adly, 100 grs. falt of fylvius contain 64,2 of alkali, and 35,8 
of the ftrongeft marine acid, equivalent in ftrength to 73 nearly 
of ftandard. Mr. Storr afferts, that it fuffers no lofs of weight in 
a heat below 590°. 
Tue proportion affigned by Mr. Bergman to 100 parts of this 
falt is 61 of alkali, 31 of acid, and 8 of water. Hence by him 
100 parts pure vegetable alkali take up 50,82 of ftrongeft marine 
acid, and afford about 164 of falt of fylvius. 
Mr. Wenzel’s refult fcarcely differs from mine; he found that 
83,5 grs. of pure alkali were faturated by 202 of his {pirit of 
falt, and that the refiduum after evaporation and expofure to 
a red heat weighed 129 grs.; of thefe 83,5 were alkali, and 
therefore the remaining 45,5 were acid. . 
Hence, ft, too parts pure vegetable alkali afford by his 
experiment 154,5 of falt of fylvius, and take up 54,5 of the 
ftrongeft marine acid. j 
_-adly, 100 parts of this falt contained 64,42 of alkali and 
35,58 of acid. When this falt is cryftallized, he thinks that 
240 gts. of it contain 8 of water, as they lofe fo much in a 
red heat; but it is probable that this lofs is rather occafioned 
by the difperfion of the falt, or the lofs of part of its acid, and 
fome {mall portion of water not neceffarily belonging to its con- 
titution,; and this feems confirmed by his experiment, for 83,5 
parts of pure alkali fhould, by my determination, take up 46,5 
of the ftrongeft acid, whereas in his experiment they took only 
45,5, which decreafe may well be attributed to the ftrong red 
heat he employed, for his falt was melted. 
2 HENCE 
