22 THE CULTURE OF THE MULBERRY SILKWORM. 



Many cultivators do not change the beds and doul)le the space until 

 after the lirst molt, allowing all the worms to change in the same bed. 

 In this case, ownng to the distribution of leaf for one or two days after 

 the molting has begun, the molting worms are covered by a more or 

 less thick coat of litter, and exposed to emanations of bad gases in a 

 critical period of life, which is likely to cause disease. Besides, in 

 the first age, the worms are so small that they are likely to l)e lost in 

 the litter, or to perish from sutl'ocation. Hence, it is healthier to 

 change beds and double the space before the molt. 



THE SECOND AGE. 



The coming out of the molt is announced by the appearance of a 

 small triangular-shaped livid spot on the worm's head, and the changed 

 skin is grayish in color. The worm takes several hours to recover 

 from a change; then it l)egins to search for food, which, however, as 

 before stated, must not be given before all the worms have recovered 

 from the molt. Then a slight meal is given by means of perforated 

 paper or nets. The worms crawl up promptly and can he easily 

 gathered up and placed on fresh shelves. 



If the two sets of worms recover from their molt at the same time, 

 they may be classed together; if there is a difference of a day, it will 

 be necessar}' to keep them separate throughout the rest of the rear- 

 ing, for the equality of age has disappeared, and, if they are put 

 together, the second change will not occur simultaneously for all the 

 worms, but will extend over several daj's, and occasion the greatest 

 trouble to reestablish the equality of size necessary for the best results. 



In case no worms have had change of bed before the molt, do not 

 reconunence feeding until the greater part of the worms are awake. 

 Do not fear that they will suffer from hunger. Then form a new 

 division of those still molting. It is frequently better to have two 

 divisions, but if, to simplify the work, but one is desired, by putting 

 the backward worms on the highest shelves, and feeding them oftener 

 than the advanced set, an e(|uality may be reestablished. 



Three days after the tirst molt the beds must be renewed, and at 

 the same time more space must be allowed the worms. 



The second age is the shortest, being less by two or three days than 

 any of the others. Toward the fff th day of this age the worms begin 

 to molt again. Then act as before — that is, by aid of nets or per- 

 forated paper, remove the ])ackward worms, in order to place them 

 elsewhere, and try by more heat and abundant food to make them 

 catch up with the forward worms. 



THE THIRD AGE. 



The worms double their size in their third age; consequently the 

 space allotted to them must be doubled; that is, they must have 16 

 square yards instead of 8 square yards, as in the second age. 



