SILK-WORMS. 
311 
be made of any branches, wicker, or wood, or 
basket-work ; so that it be not close, but woven 
open, to admit of the air being in contact with 
the paper underneath, which keeps it dry. The 
breadth of hurdles or tray should be from 29 to 
37 inches, the length from 18 to 24 feet, and they 
should be of equal sizes, that when put above one 
another, they may not interfere with the square 
baskets, or extend out, so as to be inconvenient- 
(Fig. 30.) On the ledge or borders of these trays 
may be painted in letters, the number of square 
feet contained on the surface ; for instance, 
supposing the wicker-tray 20 feet long, and 3 
feet wide ; the numbers to inscribe would be “ 30 
feet square,” &c. (Fig. 7.) 
Spoon . — It is made so as to stir the eggs with 
care. (Fig. 8.) 
Small portable trays, made of thin board, of 
about a foot in width, and sufficiently long to 
fit across the breadth of the wicker tray or' 
hurdle. The handle should be fixed in the cen- 
tre, so as to allow of their being carried firmly 
with one hand. They must be very smoothly 
finished, that the silk- worms may get upon them 
without difficulty. The ledges round three sides 
about half an inch deep. (Fig. 9.) 
Ventilators . — Apertures covered with panels, 
which should slide up and down easily, by means 
of two grooves, in which they are fitted j when 
