particles were not created as food for thefe animals. 
Now when we (ee, that the oft before mentioned' 
round particles do not proceed from themfeives, but by 
procreation, as we know that all plants and feeds arc- 
procreated, viz, that in each feedj be itnever foliiiai], 
yet it has its plant inclofed within it, we canaflureour 
felves more than before concerning procreation of all 
things. As to me, I put down as a certain truth, that 
the fmall round particles that are found in the 
great ones are feeds, arid that without them, the round 
particles could not be made. 
I have this Summer leveral times been about the wa- 
ters near our Town, to examine them, and the la ft: 
time was the 8th oiOShber 1699. but I could never fa- 
tisfie my felf more. ^ - ^ 
I faw at the fame time a friiall Frog leaping, which I 
did judge had been an egg the laft fpring,which I caufed 
to be catched , and when I came home I did place it 
in a tube of glafs , which was an inch wide and ten 
inches long, and did ftop both the ends up with cork, 
yet after fucih a manner, that at one end the air could. 
go out and in. 
I did view the toes of the fore-legs by the help of 
a Magnifying-glaft,to fee tlie circulation of the blood , 
which I could not but with great difficulty difcern. :v/ 
But when. I came to look upon the hindmoft Legs, 
and; did look upon the skins that are between-^tha 
toes^ which are on purpofe to fwim withal, as we fee 
in all the feet of Water-birds, I faw in a great many 
veins that were very fmall the blood circulate^ Af^Uiicfi 
did pleafe me fo well, that I did look upon ittot} feA*- 
rai days fucceffiveiy. . vi*>r;.' 
I did alfo obferve, that when the Frog was p'uttihg 
out its Leg,that thereby the circulation of the blood was 
ftopt for a fmall time, but as foon as it ftood (till again, 
the blood began to circulate again.. When I fiiw this, 
I>did imaging that wJien thiS' Aniidal did tliruft its 
