SILK-WORMS. 
299 
Six wicker hurdles may be put one above another 
on each side, and in the length there should be a 
row of wicker hurdles at about two inches from 
the wall, to allow the air to circulate round them. 
These hurdles should be thirty inches wide. 
Down the centre of the laboratory there are two 
rows of wickers, of above 33 inches wide each 5 
there is to be a distance of one foot ten inches 
between the rows. This distance is sufficient to 
allow free passage to and fro, and as the posts 
and horizontal boards that support the hurdles 
form a sort of ladder by which the highest hurdle 
trays may be reached with convenience, one 
author. More quickly to disseminate his improved method 
of rearing silk-worms, M. Dandolo requested the great pro- 
prietors to send him pupils whom he instructed in his labo- 
ratory. These pupils often occasioned great losses, as he, 
to give them practical skill, allowed them to act alone. This 
occurred particularly in the distribution of leaves in the fifth 
age, at which period the worms proceeding from 20 ounces 
of eggs, occupy a surface of 3000 square feet ; so it may be 
easily conceived how serious a loss might be occasioned by 
the waste of mulberry leaves when it is not distributed with 
carefulness. M. Dandolo lost many thousand pounds of 
the leaves by the waste of his pupils during the fifth age. 
“ But it signifies little (this philanthrophist would say), com- 
pared to the advantage of generalizing and naturalizing the 
improved art of rearing silk- worms by means of these pupils.” 
These pupils cost the proprietors but very little during the 
short season of the management of the silk- worms, and re- 
turned, after this trifling apprenticeship, capable of mana- 
ging a large laboratory and establishment of silk-worms. — 
French Translator. 
O 6 
