OF MED VI. 39; 



{, iv. (Mtnical Analyjls of this ll'ntcr. 



\ rous'D \>y experiment that the water of 

 Mcdvi contained two volatile principles, aerial 

 acid, and hepatic gas. It contains alfo iron di- 

 folvcd in aerial acid, or aerated ; a little tali ted 

 !iinc ; as alfo a final! (juantity of common fait, 

 and mucilaginous extract. 



The pa-fence of the aerial acid is detected nor 

 by the taile, but by the infulion of lime water, 

 or tinchire of lurnfole. There are fcarccly ever 

 more than fix cubic inches in a pint of water. 



The fmell again betrays the prefcncc of he- 

 patic air : but fo final 1 is the proportion in which 

 it is contained in thcfc waters, that no fulphur 

 is produced upon the infuiion of fuming fpirit 

 of nitre. Collected with the aerial acid, it fills 

 a fpace of 14 cubic inches ; but when abiorbcd 

 by lime-water, its mcafure is only eight cubic 

 inches. 



Tinclure of galls, and a lixivium of blood, 

 indicate the prefcncc of iron: Or, if the water 

 be fullered to remain for a few days in the open 

 air, the iron falls to the bottom without any 

 addition being made. From which it appears 

 to have been maintained in folution by aerial 

 acid. 



it is fomc time fincc I propofed a proccfs for 

 whether martial water be fit- tor 



medical 



