286 
THE ART OF REARING 
As we must suppose that many proprietors 
will have laboratories constructed, so as to ensure 
an abundance of cocoons, I will here give a short 
detail of the construction of a laboratory, and 
point out a few indispensable alterations and 
reforms that may be made in the laboratories of 
tenants and cultivators which are already built ; 
and these reforms are infinitely to the advantage 
of the proprietors and cultivators. 
In speaking of these two classes of laboratories, 
I must also mention one of the most necessary 
appendages to such establishments ; the place 
required for preserving the mulberry leaves 
fresh and good during two or three days, by 
which means the loss which might occur from 
being obliged to feed the worms upon wet, or 
withered, or fermented, leaves, will be entirely 
avoided. 
If the construction of the building which is 
to be occupied by the silk-worms during their 
lives is of importance, it may not be useless to 
give a description of the utensils and tools most 
likely to facilitate all the necessary operations 
which are to be executed. 
We shall, therefore, in this chapter, speak, — 
1st. Of the laboratory of the proprietor. 
2d. Of the laboratory of the cultivator, or 
tenant. 
