t ^94 1 



SeFiion i/f. 



VlTRIOLATED TaRTARIN. 



By my determinations, 86 grains purified and dry tartarin * were 

 faturated by 130 grains of vitriolic acid, whofe fp. grav. at 60** 

 was 1,565. 



Now this fp. grav. indicates by the table 54,46 real acid ; con- 

 fequently 130 grains of it contained 70,79 real acid, and 86 tar- 

 tarin + 70,79 real acid = 156,79 vitriolated tartarin. 



Hence 100 parts tartarin take up 82,48 of real vitriolic acid. 

 And 100 parts real vitriolic acid lake up 121,48 of tartarin. And 

 100 grains tartar vitriolate contain 54,8 tartarin, and 45,2 of 

 real vitriolic acid ; or in round numbers 55 tartarin, and 45 real 

 acid ; or in the proportion of 1 1 to 9. 



Experiment of Dr. Black. 



Since the publication of the above mentioned determinations, 

 the highly delicate and accurate experiments of Dr. Black, under- 

 taken with the view of afcertaining the contents of the Geyfer 

 waters have appeared, wi'Ji one of which 1 have compared the 



foregoing 



' . . .... . - * 



• By tartarin the mere cauftic (late is indicated ; when it contains fixed air I call 



it mild ; or fully aerated, if it be laturated therewith. 



