SILK-WOttMS. 
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of about 36 feet long, and 30 feet wide, which 
forms a continuation of the large laboratory, and 
which also contains wicker tray stands sufficiently 
raised to facilitate the necessary care of the 
worms in the laboratory. There are in this hall 
six windows (2), and six ventilators under the 
windows nearly on a level with the floor (A), as 
well as four ventilators in the ceiling. 
There are six fire-places in the great laboratory, 
one in each angle, and one on each side of the 
centre (A). 
I had a large round stove of about three feet 
eight inches wide, and nine feet two inches high, 
placed in the middle of the laboratory (g); it 
divides the large row of the wicker hurdle stands. 
I use small glass oil burners or lamps that 
yield no smoke, to light the laboratory in the 
night. 
The floor of the laboratory is the only one 
that is covered with Italian cement (ghiarone) or 
stucco. That in the hall is made of bricks, that 
in case of necessity the leaves may be dried on it 
when they are wet with rain ; and the eggs may 
be dried in it after they have been washed in the 
first process. 
Between the hall and the great laboratory, 
there is a small room having two large doors : the 
one communicating with the great laboratory ( i). 
O 3 
