Csv) 
- places deeper, in Tome lhallowerj in fame places narrower, fh 
Lome broader 5 bur lies altogether, and is perfeff Lead, only in 
the Ourfide, covered with reddijb Earth. 
To the Queries in the ftxth T itle,/ cannot fay much * it muft 
be refolv’d by them, that melt the Lead-Ore, with which / have 
not been much acquainted, fave only, that they beat the Ore 
fmall; then wafli it clean in a running ftream 5 then lift it in 
Iron-Rudders 5 then they make of Clay or Fire-Rone a Hearth 
or Furnace, which they fet in the ground, and upon it build 
their Fire, which is lighted with Char-coal, and continued with 
young Oaken-gadds, blown with Bellows by Mens treading on 
them: And after the Fire is lighted, and the fire-place hot, 
they throw their Lead-Ore upon the Wood, which melts down 
into the Furnace ; and then with an Iron-Ladle they take it our* 
and upon fand call it into what forme they pleafe. 
So far this Account , which is hoped will be made in time 
more compleat, and Succeeded with the like Anfwers from 
other places. 
An ExtraB 
of a Letter, fent from Paris, about the Load-ftone ; where 
chiefly the fuggeftion of Gilbert touching the Circumvolu- 
tion of a Globous Magnet ^ call'd Terr ell a ; andthe Va- 
riation of the Variation, is- examined , 
This Letter was written by the Intelligent and Experienced AEonfieur 
Petit, Intendant of the Fortifications of his Moil Chriftian Majefiy, to the 
Publisher , asfollorses 
I Have received yours, wherein you defire to know myfenti- 
ment about the prefent Variation of the Needle , intimating 
withal , that an ArtilHn London affirms , that whereas hereto- 
fore the Declination was E aft- ward 3 ’ti$ now about one degree and 
a half to the We ft, 
f Nothing can bemorewelcome tome, than to have occafiot? 
given me to difcourfe of this Subjeft, efpecially to the Philo* 
fophers of England r whence the Philofophy of the Magnet 
Hh h % “ ~ ’ had 
