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found it to weigh 110,125 grains, as he knew 55 of thefe to be 

 acid (or according to him 54'), he naturally fuppofed the remainder 

 to be vol-alkali ; hence according to him 100 parts offal ammsniac 

 thus dried contain 49 parts of acid and 5 1 of vol-alkali. The dif- 

 ference between us feems to arife from the lofs always experienced 

 during evaporation, and if this had not happened, the dry refiduum 

 would have amounted to 128 grains; as to the quantity of vol-al- 

 kali he had no method, of eftimating it. 



CoRNETTE perfedly decompofed 2304 grains of fal ammoniac 

 by an equal quantity of lime, which he flacked after weighing it, 

 examining the refiduum, he threw it on a filter, and edulcorated it 

 with repeated effufions of water, and what remained undifTolved 

 he found to weigh, when dry, 756 grains, and hence he judged 

 the remainder, viz. 1548 grains to have been diffolved by the acid 

 of the fal ammoniac, and to confirm this conclufion, he precipi- 

 tated the folution which had pafTed the filter with a fixed alkali, 

 and drying the precipitate, found it to weigh '1542 grains* ; 

 whence it feems to follow, that the acid contained in 2034 of fal 

 ammoniac had diffolved 1542 of lime, whereas, by my calculation, 

 it fhould diffolve but 1272,46 of lime, for fince 100 grains of fal 

 ammoniac contain 42»75 of real marine acid, 2304 fhould contain 

 looS; and fince by the third table 100 grains real marine acid take 

 up 118,3 of lime, 1008 fhould take up but 1272,46 of lime. 



But 



* Mem. Par. 1786, p. 533. 



