VOL. XIV.] PHILOSOPHICAL TRANSACTIONS. 107 



sickness or otherwise, I permitted to be printed off 4 plates more, which I had 

 by me, very exquisitely designed, of the beetles of England ; and having not 

 the leisure to transcribe and perfect the tract to which they belonged, I neither ^,. 



numbered nor explained them, and therefore I call them mute tables : yet I am 

 desirous thereby to encourage and recommend even bare and naked designs of 

 the things of nature; that such persons as are wealthy and much at leisure, and 

 are only willing to please themselves with elegancy of picture, may do good to 

 posterity, in seeing that part of natural history well performed, which otherwise 

 is scarcely in the power of private men ; whose industry and studies are very often 

 at a loss for want of that necessary help; which, if well done, might be re- 

 ferred to. 



In the appendix, besides the additions, the whole genus of musculi fluviatiles 

 is new described with more exactness. Also the pholas kind, that is, a certain 

 sort of shell -fish, fast inclosed; and that naturally, in submarine rocks, is much 

 enlarged, and the animals themselves are figured in some of them : by which a 

 great objection is obviated, of those who assert equivocal generation ; for these 

 are inclosed in the rock, every one in a single hole of its own making, so that 

 it was difficult to imagine how they could copulate; but by the figure we 

 are eased of this doubt, for each animal has a long body, naturally exerted 

 and extendable to a great length, as may be seen if they are put alive into 

 water ; so that we may well imagine they couple not unlike earth-worms, which 

 come out of the ground for that purpose, and extend as much of their body as 

 is necessary to meet a mate; which, if it happen to be near, their bodies are 

 most within the ground, -if farther distant, they are accordingly extended. 

 And after this manner we must think of the solen kind; which are a sort of 

 shell-fish deep bedded in sand, as the other is in the rock: these rise up at 

 certain seasons, and by the like body extended, copulate. 



END OP VOLUME FOURTEENTH OF THE ORIGINAL. 



• 



Some Experiments about Freezing ; with the Difference between common fresh 

 Water Ice, and that of Sea Water : also a probable Cmijecture about the 

 Origin of the Nitre of Egypt. By Dr. Lister, F.R.S. N° 167, p. 836. 

 Fol. XV. 



Dec. 3d, 1 684, at night, I exposed 4 glass bottles in the open air on the 

 ground to freeze ; viz. one of the red natron water from Egypt ; another of a 

 strong solution of nitrum murarium in fair water; a third of sea water taken 

 up at Scarborough, and more than half evaporated; and a fourth of the sulphur 



p 2 



