[ "^Sl ] 



^j-aV (hould take 222, or more exadly 2 1 6,2 1 of fironthian earth, 

 and afford 540 of cryftallized, or 313,5 deficcated muriated ftron- 

 thian. 



StElion i^tb. 



Muriated Lime. 



In my experiment already mentioned 158 grains of powdered 

 Carrara marble were faturated by 402 of muriatic acid, whofe 

 fp. grav. was I>i355» which contained 17,5 per cent, real acid; 

 therefore 402 grains of it contained 70,55 real acid. The 158 

 grains marble (at the rate of 53 per cent.) contained 83,74 of 

 lime. Then 83,74 grains lime took up 70,55 of real marine 

 acid. To efFedl a faturation a heat of 160*' was employed to- 

 wards the end of the folution. 



Hence 100 grains of lime would faturate 84,488 of real marine 

 acid. And 1 00 grains real marine acid would faturate 1 1 8,3 of 

 lime. 



In Wenzel's experiment the acid was not faturated, and hence 

 the refult differs from that of mine. To 240 grains of his fp. of 

 fait he added 120 grains of fragments of purified oyfter-fliells 

 (which, as we have already feen in treating of felenite, con- 

 tained 5 2,8 per cent, of lime,) and at tlie latter end expofed them 

 Vol. VII. K k to 



