O F S I L K. 121 



little fomet'imes after their head begins to 

 fwell i and their flate of total inaction doth 

 not come on immediately j fo that they are 

 perhaps a day longer in a flate of eating, 

 than they are of abfolute fading. So that 

 you might reckon four days, in three of 

 which they feed heartily, the fourth eat a 

 little, and on the two next totally fad. 



Malpighius, who took his dates of their 

 ficknefs from the beginning of their total- 

 ly ina6live date, divides the times of their 

 health and ficknefs in the following man- 

 ner : after their being hatched, they con- 

 tinue in health for ten or eleven days, then 

 they are fick about a day and an half ^ their 

 health after recovering lads four days and 

 an half J and their fecond ficknefs a day 

 and half; their next health continues for 

 three days; and their fubfequent and 

 third ficknefs a day and half; the next 

 health, which proceeds their lad ficknefs, 

 he fets down at four or five days continu- 

 ance ; the lad ficknefs at two days and an 

 half ; and their lad healthy date nine or 

 ten days and then they begin to fpin : but 

 he obferves that the weather, and other 

 circumdances make thefe times vary. 



5 Not- 



