SILK-WORMS. 
39 
is poured over them, and they must again be 
washed, and gently rubbed, to ensure their sepa- 
rating from one another. 
My custom was slightly to shake the eggs in 
the wine, and then pouring it off quickly, the 
light eggs were thus carried of, and separated 
from the heavy; experience has shewn me that 
■these light eggs are equally as good, and I have 
found that the difference in their specific weight 
is very small*. When the wine is poured off, the 
eggs should be allowed to drip, and then spread 
upon other linen cloths. 
liquids. However, the eggs washed in strong deep-eoloured 
wine, in which they have been left to soak for some hours, 
hatch later; it appears as if a sort of varnish formed itself 
round the shell, which may retard a little the necessary evapo- 
ration of the humours which give rise to the change of the 
embryo into the worm. 
Those who wash the eggs in muddy wine of a dark colour, 
thus give to the yellow and dusky eggs a red colour, very 
similar to the colour of the impregnated egg, and by this ar- 
tifice, any eggs may deceive, by appearing of a good quality. 
* 7’he difference of specific weight in the impregnated eggs 
of the silk-worm of four castings is not perceptible, indeed 
I think there is none. 
I mention those impregnated, because I have found a mani- 
fest difference between these and those not impregnated, of 
a yellow and reddish cast, although they all possessed a greater 
specific weight than water. 
Thus in an ounce of impregnated eggs there will 
be found . 39. 1GS 
In an ounce of reddish inferior eggs . . . 43. OSO 
And in an ounce of yellow eggs not impregnated 44. 109 
