52 The Polype'^ natural Wa^ 



one Summer, amount to many Thoufands* 

 But, at all Seafons, a great deal of their In- 

 creafe, in Number as well as Bignefs, de- 

 pends on their being well fed, and kept 

 clean. 



A great deal of Pains has been taken by 

 my worthy and ingenious Friend, the Reve- 

 rend Mr. Henry Miles, of Tooting in 

 Surry ^ F. R. S. to obferve carefully the Pro- 

 grefs of this Creature's natural Increafe, in 

 order to make fome Calculation of the Num- 

 bers produced thereby within a certain Time. 

 And as he has been fo obliging to communi- 

 cate to me the Refult of this curious Expe- 

 riment, in a Letter, dated the fifth Day of 

 September^ i743> I ih all now, Sir, have the 

 Honour of laying it before you in his own 

 Words. 



" The fingle Polype^ fays he, which was 

 " put into a Glafs by itfclf July 1 2. with two 

 " Intentions, viz. that I might learn how 

 " long-liv*d the Creature is, and at what 

 Rate it produces Branchers, is ftill alive : 

 and goes on to produce at leaft five in a 

 Week, one Week with another. But 

 becaufe this Polype had the Appearance of 

 a young One on it, when I firft fet it apart, 

 (which young One came off in three Days) 

 I was wiUing to make Trial how long it 

 would be before a feparated young One 



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