Restoration of the Silkworm. 167 
The wild indigenous mulberry of Mussooree, with thick coarse 
leaves full of milky juice, is often so thickly covered with the 
larvee of Bombyx [Huttoni, that by the beginning of May there is 
not a single leaf upon the tree wherein the worm can spin its 
cocoon; yet although the thinner-leaved cultivated mulberry 
may abound in the immediate neighbourhood, it never by any 
chance experiences the same treatment; so that taking the hint 
from nature, I am inclined to recommend for the Bombyx Mori, 
when cultivated in the upper provinces, and more especially in 
the hills, such leaves as those furnished by M. nigra?, M. 
Stnensis, Bédana or seedless long white mulberry, and others of 
the thick rough-leaved kinds. 
At the same time it is highly probable that certain species, 
which are wholly unadapted to a cold hill climate and the action 
of severe frost, may thrive well in the lowland provinces of India, 
where they will likewise be suitable to the worms of warm 
localities, such as I consider the Bengal monthly worms to be. 
But to extol in general terms one species above another, and 
endeavour, on wholly insufficient and often purely theoretical 
data, to persuade people that it is the best adapted for the 
nourishment of the silkworm,—the species of worm, moreover, not 
being specified,—is, in my opinion, the surest way of propagating 
pure sophistry and of insuring the failure of speculations in other 
districts, which, from the nature of their climates, require both a 
different diet and a different mode of treatment. 
‘There is, moreover, yet another point to be considered, for 
although certain trees, such as M. multicaulis and M. cucullata, 
may thrive well enough in the Punjab and the Gangetic provinces, 
yet it is more than doubtful whether the Cashmere worm will 
thrive upon them; for while the trees delight in and are adapted 
to a warm lowland temperature, the insect, whose cultivation is 
becoming fashionable in the upper provinces, is from the northern 
mountainous tracts of China, situated between 32° and 34° of 
north latitude, whereas in our Himalayan regions frost and snow 
are the accompaniments of winter. The cultivator should re- 
member that a northern insect requires a northern tree, and the 
northern tree requires a northern climate, and that he himself 
requires a certain amount of knowledge and the exercise of 
common sense. 
Trees producing leaves of extreme thinness, like those of M. 
multicaulis and M. cucullata, are far from desirable on account of 
their containing but little nourishment, and necessitating a larger 
