(ic5p) 
1^3, as that the heat is conveyed to all parts of the bottom and fides of the 
Furnace. Then whereas they were wont to pump cold Liquor into the 
Boyler tofupplythe wafte in boyling^ whereby the Boyler was checked 
fome times ten hours ; Six Nicolas hath now a Vcfl'elof Lead, which 
he calls a Heater, placed at the end of the Boyler^ and a little higher, 
fupported by Barrs of Iron as before, and hi I'd with Liquor, which by 
a conveyance of heat from the Furnance^ is Icept near boy ling hot ; and 
fo continually fupplys the wade of the Boykr^ without hindring the 
boyling. Thirdly, by putting in due proportions of Iron from time to 
time, into the Boyler. As foon as they perceive the Liquor to boyl flow- 
3y, they put in more Iron, which will foon quicken it. 
BeiideSj if they do not continually fupply the boyling Liquor with 
Iron, the Copperas wlW gather to the bottom of the Boyler and Melf. 
And fo it will do, if the Liquor be not prefently drawn off from the 
Boyler into a Cooler, fo foon as it is enough. 
The Cooler is oblong, twenty feet long, nine feet over at the top, 
five feet deep,taper'd towards the bottom,made of Tarras.Into this they 
let the Liquor run, fo foon as it is^oylcd enough. The Copperas here- 
in will be gathering or (hooting fourteen or hfteen days : and gathers 
as much on the fides as in the bottom ; fc above five inches thick. Some 
put Bufhes into the Cooler, about which the Copperas will gather. But 
at Deptford they make not ufe of any. 
That which fticks to the fides, and to the Bufhes, is of a bright green, 
that in the bottom, of a foul and dirty colour. 
In the end of fourteen days, they convey the Liquor into an other 
Cooler, and referve it to be boylM again with new Liquor. 
The Copperas they (hovel ona Floor adjoyning, fo that the Liquor 
may drain from it into a Cooler. 
The fteam which comes from the boyling is of an acrimonious fraell. 
Coppered may be boyled without Iron, but with difficulty. Without 
itj the Boyler will be in danger of melting. 
Sometimes in (lirring the Earth on the Bsds^they find pieces o^Cop- 
perm produced by lying in the Sun. 
An AccQunt of the Salt Waters of Droytwichi^i Worcefterlhire i fent 
by Vr. William Cole from Dr. Tho. Raftell, who hath lived many 
years upon theplace^ and hath there feveral Fhats of his otyn 
SIR, 
HAving heretofore feen in fome of the Tranf^dions of the Royal So- 
ciety ^Queries concerning the Salt- Springs inChefhireyind not hear- 
ing of any account hath been given them of ours in JVorce^erfljire , 
(which I hoped fome more ingenuous Pen would have done before this 
time,^ j to fatisfie the defire of fome friend, I have made as exad tri- 
alls of our Brine as I could, that 1 might be able in fome meafure to 
oivean Anfwer to the Che(hire Queries, which if they arc not anfwer- 
6 2 ed 
