[ 2^7 ] 



fmaller, as is evident ; but by expofing any quantity of it to a 

 ftrong red heat the water will, for the moft part at leaft, be expelled, 

 and the proportion of the other ingredients may be determined 

 very nearly by the above analogy, if the felenite be faturate and 

 free from foreign ingredients. 



The experiments I made in precipitating lime from the 

 nitrous and marine acids by the vitriolic, and alfo by vitriolated 

 tartarin, I found to be fallacious, as much of the felenite remains 

 in folution in thefe acids, and confequently it is not poffible to 

 limit or difcover the proper addition of the precipitant. Hence 

 loo grains lime take up 143 nearly of real vitriolic acid, and af- 

 ford about 284 of felenite thus dried and formed. And 100 

 grains real vitriolic acid take up nearly 70 of lime, and afford 

 198 of felenite thus dried and formed. 



100 grains lime precipitated by vitriolic acid take about 15,8 

 per cent, excefs of real acid, and vitriolated tartarin does not pre- 

 cipitate the whole of it without repeated evaporations and addi- 

 tions. 



Experiment 4/?. i Klaproth, 195. 



According to Klaproth 100 grs. of vitriolic acid, whofefp. grav. 

 was 1,850 (negleding he fays infignificant fradions) were faturated 

 by 55 of lime or 100 of aerated lime, and afforded 160 grs. 

 felenite. 



Vol. VII. E e Application. 



