532 



BOOK XL 



smooth ; the blade of this spatula is a palm wide and two palms long ; its 

 handle, partly of iron, partly of wood, is similar in every respect to the first 

 one. Afterward he throws pulverised clay and charcoal into the crucible, pours 

 water over it, and sweeps it over with a broom into which a stick is fixed. 

 Then immediately he throws into the crucible a powder, made of two 

 wheelbarrowsful of sifted charcoal dust, as many wheelbarrowsful of 



A HEARTH OF THE FURNACE. B CHIMNEY. C COMMON PILLAR. D OTHER PILLARS. 



THE PARTITION WALL IS BEHIND THE COMMON PILLAR AND NOT TO BE SEEN. E ARCHES. 



F LITTLE WALLS WHICH PROTECT THE PARTITION WALL FROM INJURY BY THE FIRE. 



G CRUCIBLES. H SECOND LONG WALL. I DOOR. K SPATULA. L THE OTHER 



SPATULA. M THE BROOM IN WHICH is INSERTED A STICK. N PESTLES. O WOODEN 



MALLET. P PLATE. Q STONES. R IRON ROD. 



pulverised clay likewise sifted, and six basketsful of river sand which has 

 passed through a very fine sieve. This powder, like that used by smelters, 

 is sprinkled with water and moistened before it is put into the crucible, so 

 that it may be fashioned by the hands into shapes similar to snowballs. 

 When it has been put in, the master first kneads it and makes it smooth with 

 his hands, and then pounds it with two wooden pestles, each of which is a 

 cubit long ; each pestle has a round head at each end, but one of these is 

 a palm in diameter, the other three digits ; both are thinner in the middle, 

 so that they may be held in the hand. Then he again throws moistened 



