70 
THE ART OF REARING 
the arrangement began ; thus it will be seen ia 
what time, and in what progression, the silk- 
worms come forth. A pencil may be worn, for 
the purpose of noting the sheets of paper. 
I have said, that if the worms which appear 
the first day are in very small quantity, as it 
mostly happens, it is of no consequence, because 
the main portion come forth the second or third 
day. However, if it is required that those first 
hatched should be reared, they ought to be put 
jn an angle of the sheet of paper belonging to 
the number of their box, and only be allowed 
half the quantity of the food which is given to 
those later worms on the first and second day. 
It appears, in general, that the silk-worms 
come forth more abundantly in the forenoon, 
when the sun shines warmly into the room, the 
room being then hotter than at night. Those 
who have the care of the silk-worms at night 
drop asleep ; and when, in those cases, I have 
gone into the stove-room, I have often found the 
thermometer lowered by some degrees ; it is how- 
ever better it should lower a degree or two, than 
that it should, by neglect, rise too much. Sudden 
change of temperature injures the embryo which 
is near hatching. (Chap. XII.) 
The great alterations to which the eggs are ex- 
posed occur in the night. Those who have the 
care of the silk- worms at night heap up the fire. 
