( ^756 ) 
The fame is afterwards dryed in little and warm Cham- 
bers, put into Barrels, and thus fent away to fcveral 
Countries. > 
If one of the Melting Pots breaks, or is very much 
burnt, fo that it muft be taken out , there they find 
always on the bottom two Cakes of different ftufF, not 
mixed with one another. The undermoft is a fort of <f / 
Calckrium or ( Gleiken Spiffe ) and the uppermoft i^ of 
Marcafiu 
The Grafs and Fruits growing there about, where fuch 
a Work'houfe ftands, is commonly poifoned by the Arfe- 
nical Smoak, that no Cattel or Men can without damage 
feed upon them. 
Explicatkn of the Figures^ Tab, 4. concerning the ma* 
ii^g of Smalt. 
Fig- 2. 
'''JpHe Furnace where the Cobalt is roafted, and li^e 
J[ the Arfenick feparated. 
a The Furnace to roft the Powder'd Cobalt, 
b The Chimney accepting the Arfenical Sinoak. 
c, c. c. The Channel of Stones to colleft the Arfenick. 
Fig. 3. 
The Furnace for melting the Cobalt into a Glafs. 
aaaa the holes where ftand the Melting Pots. 
The great holes, where they put in the Pots is (hut 
up with Bricks, and a little one left, where they take 
out the Glafs with the Spoon* b b b b. 
Fig- 4- 
a Grinding Stones to Grind in Water. 
PiiiUed for Sam Smith and Men]. Walford, Printers to the Royal Society^ 
at the Princes Arms in St Pafih Church-yard, 1 705 . 
