[ 253 I 



(Per Crawford, quoted by Schmeifler in Phil. Tranf. 179, 421^ 

 muriated barytes is nearly as foluble in hot as in cold water, and 

 three times lefs foluble than muriated ftronthian.) 



To confirm this conclufion I muft add, that having precipitated 

 a folution of loo grains of cryftallized muriated barytes by a 

 folution of nitrated filver, I found the precipitate duly dried to 

 weigh 1 1 8 grains, which as we fhall prefently fee argues the pre- 

 fence of 19,51 of real marine acid. I alfo found that 100 parts 

 muriated barytes expofed to a heat of 300° for two hours, loft 

 16 grains of water of cryftallization, hence we may rate in round 

 numbers the proportion of ingredients in this, fait, at 64 of earth, 

 20 of acid, and 16 water of cryftallization. 



SeSiion 4-tB. 



Muriated Stronthian. 



Klaproth obferved, that 55 grains of native mild ftronthian 

 faturated 100 of marine acid, whofe fp. grav. was 1,140, this being 

 diluted with 50 grains of water, 100 grains marine acid of this 

 fp. grav. contain, computing from my table 18,11 grains of real 

 acid, and 55 grains mild ftronthian, (at the rate of 69 per cent.) 

 contain 37,95 of mere earth. 



Hence 



