C 473 ] 
From the above experiments, it appears, that 
Amlwch water is ftrongly impregnated with an acid 
martial vitriol. 
It kills all the fifh in its paffage. 
It has fometimes been drunk ; but cannot be borne 
in a greater dole than half a pint, unlefs diluted with 
common water, being otherwife vomited up. 
It cures the mange in horfes, and the itch in men, 
by bathing. 
From the above account of the Amlwch water, it 
appears evidently to agree to that of the Hartfell, 
above-mentioned, and deferibed ' in the Edinburgh 
Effays, and in the Philofophical Tranfadtions, even 
in certain diftinguifhing characters common to both, 
and in which they differ from our ordinary chalybeate 
waters; viz. 
1. In the acid and vitriolic tafte, which, more- 
over, they retain, when long kept, and at a diftance 
from their fountains ; and even upon boiling, yield- 
ing an acid vitriolic fait, on exhaling to drynefs, which 
the common chalybeates never do,, but lofe their 
ftrength by a fmall degree of heat. 
2 . In the blue tindture, which they give with galls 
another diftinguifhing charadter of Englifh vitriol, of 
which a weaker folution, like the common chaly- 
beates, gives only the purple colour with galls.. 
3. In exhibiting green clouds, or grumes-,., with oil* 
of tartar, like the martial vitriol.. 
The fame, or like appearances, are exhibited by 
the Shadwell water;., by another at Swanzey in Wales 
and, upon a late diligent fearch into the waters of this 
kingdom, by thofe of Kilbrew, in the county of 
Meath ^ of Ballymurtogh, in the county of Wick.- 
