C *74 ) 
Day, or Twelve a Clock ; and thefe Courfes they 
efteem the beft. Thefe Seams or Courfes run between 
the Rocks, generally wider than thofe of Lead- Ore, 
unlefs they are inclofed in very hard Cliffs, and then 
they are as narrow as the Veins of Lead. The Colour of 
the Earth where Calamine lies, is generally a yellow 
Grit, but {bmetimes black ; for all Countries, as they 
term their under-ground Works, are not alike. Calamine 
it felf is of feveral Colours, (ome white, fome reddifli, 
fbme greyiih, fome blackilh, which is counted the beft ; 
but when this is broken, it is of feveral Colours. In 
working for it below in the Countries, they ufe the fame 
way and Infiruments as they do in Lead-Mines ; and 
(bmetimes they light upon a good quantity of Lead, but 
always rind feme Eyes of Lead among the Calamine, 
which in ordering of it they feparate : Though I think 
in Lead Mines they do not always find Calamine. In 
landing of the Calamine fome pieces are bigger than 
others of different fizes, as other Stones are, and mixt 
with the gritty Earth ; yet I have been informed by a 
Perfon concerned in thele Works, that they have found 
one entire piece of 8 or 10 Tun, which by reafon of 
its bignefs was fore'd to be broken in the Groove before 
it could be landed; but generally in thefe Grooves where 
I made my Enquiry, it rifeth in fmall Particles, fome 
more, fome Ms, and feme about the bignefi of a Nut, 
and this they call a fmall Calamine. In ancient Works, 
(which are thole that have been forfaken and afterwards 
worktin again) Damps and Staunches, (bmetimes arife, 
but never in new Works but that thefe Damps arife, 
an experiene'd Groover tells me is the Fault of thofe 
Workmen, that do not take care to carry Air along 
with them, which is done by Air-Shafts, as in Lead- 
Mines. 
When ; 
