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estimated, that under ordinai’y circumstances an acre should 
support from 700 to 1000 Mulberry-trees, producing 
5000 Ihs. of leaves fit for food, when four years old. On 
this quantity of leaves can he reared 140,000 worms, from 
which ova at a nett profit ranging from £80 to £240 per 
acre will he obtained by the work of one person. Mr. C. 
Brady, of Sydney, thinks the likely proceeds of silk-culture 
to be from £60 to £150 for the acre. The discrepancies 
in calculations of this kind are explained by diflTerences in 
clime, soil, attention and treatment. 
The White Mulberry-tree has been very copiously distributed 
from the Melbourne Botanic Glarden since many years. A 
very palatable fruit is obtained from a variety cultivated in 
Beloochistan and Affghanistan. Morus Tatarica, L., 
resembles M. alba. Its juicy fruit is insipid and small. 
The leaves are not generally used for Silkworms. 
The results of Mr. Brady’s experience on the varieties of the 
Morus alba are as follows In the normal form the fruits 
are white with a purplish tinge more or less deep, the bark 
is pale, the leaf is also of a pale hue, not very early nor 
very tender, nor very abundant. It may be grown on moist 
ground as long as such is drained, or it will live even on 
poor loose gravelly soil bordering on running water. The 
Cevennes variety is a free grower, affords a large quantity of 
leaves though of rather thick consistence ; all varieties of 
the Morus Bombyx like these leaves at all stages of their 
age. It is also called the rose-leaved variety. The silk 
which it yields is substantial in quantity and also good in 
quality. It does best on rich dry slopes. The bushy 
Indian variety has a fine leaf of beautiful green, which 
though light in weight is abundantly produced. It can be 
cut back to the stem three or four times a year ; the leaves 
are flat, long and pointed, possess a fine aroma, and are 
relished by every variety of the ordinary Silk-insect, though 
not all thrive equally well on it. The silk derived from this 
variety is excellent, but not always so heavy in quantity as 
that produced from the rosy variety. It prefers rich low- 
lying bottoms, is a greedy feeder, but may thus be made to 
