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the worms, are four feet wide in the center, but those 

 alongside of the walls only three feet. The rafters are 

 laid across for a second floor, but they are only 

 boarded, where the galleries are, for attending the 

 worms ; the object of this arrangement being to allow 

 the air to circulate everywhere. 



In order to be able to regulate the temperature and 

 have plenty of air, I wish a kind of second roof on the 

 top should be raised at about twenty inches from 

 the other, and projecting on each side from four to five 

 feet. This gives the appearance of a double roof. 

 With some hinges, lids can be hung that we can open 

 and shut at will. 



In the cocoonery it is very important to have nothing 

 that would give a bad smell, and more particularly 

 tobacco. That drug is a regular poison for the worms, 

 and no one that smokes or chews tobacco should be 

 allowed to go into a cocoonery, as the breath, which is 

 impregnated with that drug, is very injurious to worms. 



The cocoonery should be built in an airy situation, 

 because what the worms need most is plenty of air and 

 space. In regard to space, I see that Count Dandolo 

 says, that he considers the following estimate as afford- 

 ing sufficient space for a million of silk worms, or in 

 this proportion for a greater or less number : for the 

 first age, two hundred square feet of surface ; for the 

 second age, three hundred and seventy-five square feet ; 

 for the third age, eight hundred and seventy-five 

 square feet; for the fourth age, two thousand and 



