J 48 
A JOURNEY FROM MADRAS THROUGH 
CHAPTER 
III. 
June g. 
The rude sketches in the Figures 12 and 13, will assist the reader 
to understand the following account of the furnaces by which the 
first operation is performed. Two or three of them are in general 
constructed in tlie same building (a a a a), which is erected in form 
of a terrace against one of the walls of a yard ; and which, where 
there are three furnaces, may be six feet high, twelve broad, and 
twenty-six long. The furnace (b) is arched, and in the summit has 
a round opening (c) about two feet in diameter. This is covered by 
a flat stone (d), in which there is an aperture (e). Near the surface 
of the ground is a platform (f f ) which has an aperture in its cen- 
tre (1). This divides the furnace into two cavities, the lower of 
which (g) serves for the fewel, which is introduced by an, opening 
(h) at the bottom of a niche (i i i) that is formed in the front of the 
terrace. The crucibles containing the materials (k k) are intro- 
duced by the opening (c) in the summit of the furnace, and placed 
in a circle on the platform (f f). The opening (c) is then covered 
with the flat stone (d), and the air is excluded by covering the 
stone with moist clay. The small hole (e), however, is left open. 
The fire place (g) is then filled with wood, and the fire is managed 
according to the nature of the materials which the crucibles 
contain. 
For making green glass, take of the following articles according 
to apothecary’s weight: 
Broken glass ------- 
Banaji Callu, powdered white quartz 
Loha (an old button like brass was given to me as 
a specimen) ------ 
Copper - 
Caricullu, iron ore with manganese 
Soulu , , or impure soda t 
lb. 
14 
14 
0 
0 
0 
29 
oz. 
9 
9 
3 
2 
2 
6 
dr. scr. gr. 
0 0 0 
0 
0 
2 
9 
1 
0 
1 
v- 
1 
2 
0 
0 
13 
id 
2 
0 
lb. 38 11 5 2 11 
This is the charge for one crucible. 
1 
