30 
THE ART OF REARING 
abounding in nutritive matter, than those pro- 
ducing resinous or silky substances. 
I have found that the best mulberry leaf of any 
species, is that which is called the double leaf ; it 
is small, not very succulent, of a dark green, shin- 
ing, and contains little water, which maybe easily 
ascertained in drying some of them ; the tree pro- 
duces them in great abundance*. In general the 
* It may be of some use to subjoin a list of the varieties of 
tlie mulberry tree hitherto described, and at the end of the 
note will be found a calculation of the diminution in weight, 
by drying, of each quality of leaf which I employ for the 
ood of silk-worms. 
1st Species. Morus Alba . — This species comprises the 
common wild mulberry, which has four varieties in the 
fruit, two have white berries, one red, and the other black ; 
there are two varieties in the leaf, the one leaf deeply indent- 
ed, like the leaf of the white hazel ; the other larger, not 
much indented, or lobed. The common grafted mulberry is 
a variety of the first of these two that I have described, and 
itself comprises the following varieties : — 
1st, Of a white berry. 2d, Of a red berry. 3d, Of a 
black berry. 4th, Of a large leaf, called of Tuscany. 5th, 
Of a middle-sized leaf, dark-green, called in Italy foglia giaz- 
zola. 6th, Small leaf, of a dark colour, rather thick, called 
double leaf, more difficult to pick, and the best calculated 
for the nutrition of silk-worms. There are besides the fol- 
owing species : — 
1st, Morus tactaria. 2d, Constantinopolitana. 3d, Nigra, 
. (the common mulberry, well known, a fruit of a sweet fla- 
, vour, particularly cultivated in the Ex-Venetian provinces.) 
4th, Rubra (cultivated in botanical gardens.) 5th, Indica 
(also cultivated for botanical purposes.) 6th, Latifolio (cul- 
tivated in botanical hot^houses.) 7th, Australis. Sth, La- 
tifolia. 9th, Mauritiana (these three latter sort are little 
