246 
THE ART OF REARING 
mulberries, 32 of stalks, and 40 of pure leaves. 
Thus it is, that this great weight of the grafted 
mulberry-leaves, drawn from the trees when the 
season is advanced, diminishes considerably, when 
we understand these details; and this also accounts 
for the large proportion of litter that is re- 
moved from the wickers in the fifth age, com- 
pai-ed to that laid on the wickers, and com- 
pared to that produced in the preceding: ages. 
(Chap. XIV.) 
The result of this must be, that if taking two 
trees of equal age and vigour, the grafted tree 
yields 501bs. of leaves, and the wild tree only 
301bs. ; on calculation it will appear, that the 
weight of nutritious substance eaten by the silk- 
worm, will be nearly equal in the two varieties of 
mulberry : the silk-worms having the advantage 
“of being nourished upon a better leaf in that of 
the wild mulberry-tree, and which will produce 
more silk. 
It would appear from what I have stated, that 
I prefer the culture of tire wild mulberry ; however, 
before decision, many proprietors should weigh 
the following observations duly. 
] . In the vast class of the wild mulberry- plant, 
there are varieties of an indifferent quality, which 
yield few leaves, tlrose leaves much indented and 
the branches thorny. (See the Note p. 31.) 
