PHYSICAL AND LITERARY. 7 



t. 



Fromthefe circumflances it is manifeft, 



that marie does not contain the fmalleft 

 proportion of an alkaline fait. And, as 

 no other fait will account for the phaeno- 

 mena, this, added to fome particulars 

 mentioned above, renders any farther 

 fearch for a faline fubftance in marie un- 

 neceffary. 



SECT. II. 



BEING fatisfied with regard to this 

 particular, the affinity betwixt calcari- 

 ous earths and marie next occurred to 

 me. Galcarious earths efiervefce with 

 acids, are remarkable for their fertilizing 

 properties, and cannot, in a natural (late, 

 be diffolved by water. So far they agree 

 exactly with marie. But their moft cha- 

 ra(fleriftical qualities are, their diffolving 

 entirely in the mineral acids, and calcining 

 to quicklime. By thefe two properties, 

 fuch earths may be diftinguiflied, where* 

 rer they occur. 



With a view to the apparent affini- 

 ty betwixt calcarious earths and marie, 

 I made the following Experiments. 



E X P E R. 



