54 



ly handsomely disposed and firmly attached to the paper 

 in a circular form. 



Should the eggs be permitted to remain exposed to 

 the warm weather, they will sometimes hatch the same 

 season, and unless another crop be desired, they will be 

 lost. The moths eat nothing after leaving the .cocoons, 

 and die in a few days after depositing the eggs. 



DISEASES OF SILK WORMS. 



The foreign writers enumerate and describe a variety of 

 diseases to which silk worms are liable in their different 

 ages, and particularly in the fifth, which all agree to be the 

 most critical. But to all these diseases they prescribe the 

 same means of prevention and the same remedies when 

 they have occurred. It is therefore unnecessary to de- 

 scribe their various symptoms, as it would lead to no good 

 practical result. 



The diseases of silk worms generally arise from the 

 want of sufficient air and space, from their not being 

 kept dry, and being fed with damp leaves, and also from 

 their not being kept sufficiently clean, particularly in the 

 fifth age. The fermentation of their litter, the dampness 

 and the bad air which it occasions, are the most frequent 

 causes of mortality among them. The greatest care 

 therefore should be taken to keep them constantly clean 

 and dry, and to give them a sufficient quantity of space 

 and air ; a current of air in fine warm days, should al- 

 ways be let into their nursery. If, notwithstanding all the 

 care taken, some general sickness should declare itself 

 among them, the remedy recommended by the writers, is, 



