C * 6 1 



corked, and along with them a letter from Dr- 

 Alexander Mackenzy, dated Augufr. 9, 1771, con- 

 taining the following account. 



** The Caftle-Loed is a ftrong fulphureous miner 

 e ral -water j when taken up from the fpring, it is 

 c as pure and tranfparent as the cleareft rock water ; 



* but if kept in an open vefTel; or an ill-corked 

 £ bottle, it loon becomes of a milky fort of foulnefs, 

 1 and it lofes its ftxong fulphureous fmell in twenty- 

 1 four hours. 



" The bottom of the well, and of the channel 

 1 which conveys its water from thence, is black, as 

 4 .if dyed with ink ; and the leaves of the aller 

 £ bufhes that fall into the well, or into its channel, 

 £ foon contract a blackifh colour in the water ; but 



* when taken out, and dried in the fun or made, 

 1 appear covered with a whitifh duft, which is un- 

 ' doubtedly fulphur j for, by burning one or more 

 ' on an ignited fhovel, or clear live coal, they pro- 

 1 .duce a blue flame, and emit a very fufrbcating 

 { fulphureous fmell. 



" All that I can learn of the operation of this 

 c water, from fome fenlible people of credit and 

 1 dbfervation, who have drunk it this as well as for- 

 c mer feafons, is, that it very fenfibly increafes the 

 c urine, and fometimes remarkably opens the poresj 

 c but I do not find, from the report of any, that it 

 c purges, though drunk to the quantity of three, 

 e fometimes of four, Englifh quarts in the day. 

 c Almoft every perfon remarks, that it whets the 

 1 appetite, and fits light on the ftomach. I have 

 - cc been told by feveral, that they have had head- 

 2 il achs 



