373 



MEDICAL PAPERS 



a 



■V, 



of the colour of Hilt of amber, and fhott into right angled 

 cryftals, which through a microfcope appeared beautifully 

 feathered; and from every experiment was found perfeft- 

 ly neutral. 



VIL Silver immerfed for fome time in the water acquir- 

 ed a flight yellow colour- 



VIIL The refiduum throw^n on a red hot iron fparkled 

 very much, and emitted a fulphureous fmell, what re 

 mained on the iron had not the leaft perceptible tafte of i 



IX. The waters, and the folutionof thechryftallzed fait, 

 changed fyrup of violets, to a fine light green. 



The firil four of thefe experiment^, in which the wa- 

 ters were decompofed as well by a volatile alkali, as by 

 lime water, and an abforbent earth, and the refiduum (af- 

 ter a flight calcination) being attraded by the magnet, evi- 

 dently prove that they are impregnated with a confiderable 



portion of iron. 



The fifth experiment (in which a decompofition takes 

 place by means of a double eledive attradion) fhews that 

 the acid in thefe waters, has a flronger affinity wath alka 

 lies, than that which is the bafis of Sal. Ammoniac, (which 

 is the marine acid,) and mufl be either the nitrous or vitri- 

 olic. And from a decompofition taking place, on the ad- 

 dition of common nitre with the Chalybeate waters, in 

 about the fame time as when left expofed in the open air, 

 w^e may rationally conclude the acid to be of the vitriolic 



kind. 



The fixth experiment fhews that there is a final! portion 



of neutral falts in thefe waters, which from the coldncfs 

 with which they affed the tongue, and the appearance of 

 the cryftals, are probably of the ammoniacal kind. ^ 



The feventh and eighth experiments together with the 

 fmell of the bath and the confiderable factor which the 

 waters acquire when kept for any time, evidently fhew that 

 they contain a third principle, which is fulphur, This 

 indeed (as well as the fait) is in afmall quantity, yet it may 

 contribute fomewhat to the medicinal virtues of thefe 

 fprings. The 



