k 



1823.] the Composition of certain Muriates* 343 



Or if we consider the salt to exist in the state of muriate, the 

 view of its composition will be : 



1 atom of muriate of barytes • • • • * 11^ 



1 atom of water . • • 9 



124 

 Or, 



Muriatic acid 29-84 



Barytes 62-90 



Water 7-26 



100-00 



Or lastly, if we adopt the opinion formerly entertained of this 

 salt, and consider it as composed of 



i atom of dry muriate of barytes • 106 or 85-49 



2 atoms of water ,... 18 14-51 - 



The weight of its atom will still be 124 100-00 



agreeing very nearly with Aikin, Berzehus, and Dr. Wollaston's 

 memoir. 



There are but few salts similarly circumstanced with the crys- 

 tallized muriate of barytes ; I shall add the equivalent num- 

 bers for crystallized muriate of strontia and muriate of lime. 



According to Berzelius (Proportions Chimiques, p. 47), 

 muriate of strontia contains 40-53 per cent, of water j the chlo- 

 ride of strontium will therefore be 59-47. Now an atom of 

 chlorine = 36, and of strontium = 44, will give 80 as the weight 

 of the atom of chloride of strontium, and as 59-47 : 40*53 :-. 80 : 

 54-52, so little exceeding 54, or 6 atoms of water, that we may 

 consider crystallized muriate of strontia as composed of 



1 atom of chloride of strontium 36 -f 44 = 80 or 597 

 6 atoms of water 9 x 6 . . , , , = 54 40-3 



Weightofatom 134 100-0 



Or regarding it as a crystallized muriate of strontia, it will 

 consist of 



1 atom of muriate of strontia 37 + 52 = 89 or 66*4 

 ' 5 atoms of water 9 x 5 ... t. ......... = 45 33-6 



"iii 100-0 



Crystallized muriate of lime, according to Berzelius, contain* 

 49-2 per cent, of water ; the chloride of calcium remaining will, 

 therefore, amount to 50-8. An atom of chlorine = 36, and of 

 calcium = 20, the number representing chloride of calcium is 

 56 ; and as 50-8 : 49-2 :: 56 : 54*23, so slightly exceeding 54,^ 

 that we may regard crystallized muriate of lime as constituted of 



