LIST OF PLATES. 
Fig-. 2. Laboratory yielding about 600 lbs. of cocoons ; it 
contains four fire-places in the angles, a stove in the centre, 
and another opposite the door. 
Fig. 3. Small laboratory, with two fire-places in twoangles, 
and one stove. 
Fig. 4. It may be seen that the tables or wicker trays are 
placed one after the other, so that several which are 15 or IS 
feet long, may, by being put together, form a single table 
of 55 or 75 feet long, and upwards. 
Plate II. 
Fig. 10. How the ventilators, which are placed in various 
parts of the laboratory, open and shut at will. 
Fig. 13. Travelling case for removing silk-worms any dis- 
tance ; each board draws out easily and slides in, and is large 
enough to hold a sheet of paper containing an ounce of eggs. 
If there are only a few ounces to be conveyed, the supernu- 
merary boards may be taken out. The case is carried like 
a pedlar's pack, on the back. 
Fig. 23. Fumigating bottle. In turning the screw, the 
stopper is raised;'; which stopper is made of ground glass 
fitted to the bottle, shutting it hermetically ; the neck of the 
bottle should be ground .also, as the two ground surfaces 
fit more closely. When it is opened, it may be removed 
from its stand, and carried any where. 
All the other Figures are objects easily understood and 
distinguished, and need no description. (Chap. XIII. § 4.) 
LONDON 
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