[ 6' 1 



tamed, the inconvenience of rejeding thenri being far fuperlor 

 to any advantages propofed by the change ? yet ftrange to tell 

 they objed: to a few new names which i introduced in minera- 

 logy though exadly founded on thein own principles and not 

 attended with any inconvenience, as they denote objedls not 

 known by any denomination previoufly afligned ta them, and 

 even poflefling peculiar properties of great importance. ThuS' 

 they difapprove * of the name muricakiie, a name vv^hich I 

 thought proper to beftow on fuch limeftones as contain a not- 

 able proportion of magnefia, and daryto calcitc on fuch as con- 

 tam a notable proportion of barytes, thefe ftones having been 

 diflinguifhed by no name, and thefe new names being in con- 

 formity with the principles of the French fchool derived from 

 and grounded on their component ingredients. 



Mr. Tennant has fince fliewn in an important paper In the 

 Philofophical Tranfadions for 1 799 the evident neceffity of dif- 

 tinguifhing thefe muricalcites from common limeftones with 

 which they have always been confounded ; and from the dele- 

 terious properties which barytic lime water pofTelfes it is 

 evident that the limeftones that contain any proportion of bary- 

 tic earth cannot without danger (fometimes to human life) 



be 



* 23 Ann, Chym. p. 103. 



