From SfRONT'IJN. 31 



really poflefled a ftronger attracflion or not. Thefe were remo- 

 ved by the refult of the following experiments : I diiiolved a 

 quantity of nitrate of potafs in boiling water^ and threw in 

 fome mafles of recently calcined Strontites. The heat genera- 

 ted commenced an ebullition, which I prolonged by the heat of 

 a fand bath, the mouth of the flalk being ilopped by a perfo- 

 rated cork. During the cooling, cryrtals of Strontites were de- 

 podted. I next diflipated by boiling much of the water of the 

 clear fluid, managing the operation fo that the atmofpherical 

 air ihould have as little accefs as poflible'. By this proceis I ob- 

 tained cryftals of nitre, intermixed with a fmall quantity of 

 cryftallized strontites. I performed a fimilar experiment with 

 a folution of muriate of foda, and the refult only differed in 

 this, thiat the cryftals of common fait were depofited during the 

 evaporation of the liquor, and thofe of Strontites, for the fe- 

 cond time, during the fubfequent refrigeration ; whence the in- 

 ference is deducible, that Strontites cannot detach the nitric or 

 muriatic acid from the alkalis with which they are united in 

 faltpetre and fea fait. 



74. The attradion of barytes for muriatic acid exceeds 

 that of the new earth. To a folution of Strontitic muriate I 

 added fome native carbonate of barytes lately calcined and re- 

 duced to fine powder. Soon marks of decompofition were ap- 

 parent, and the liquor conlifted of muriate of barytes. Mu- 

 riated barytes, on the other hand, fuffers no change from the 

 earth I have been defcribing. The attradion of lime for this 

 acid is feebler than that of Strontites. Muriate of lime became 

 muriate of Strontites. fome time after I had introduced the 

 powder of calcined Strontian fpar into it. Ammoniac was in- 

 ffcantly difengaged from the muriatic acid by Strontites. 



75. Potass attrads acetous acid more forcibly than Stron- 

 tites, and diilodges it. 



76. Phosphoric acid is one of thofe that prefer Strontites 

 to. alkalis. Strontitic water immediately caufes a precipitation 



in 



