C AM \ 
tti Fm of a Letter from Mr Arm^ van Lew- 
cnhoek, P. R. dated at Delft in Holland, 
Sept. 35. itfp^. concerning the Circulation 
arid Stagnation of the Blodi in Tadpoks. 
IN the begnning of May laft I faw in a Moat of a 
friends Country. houfe, a great many little Tadpoles, 
that change into Frogs 5 and when fome learned men 
of thisCgpntry fent me word^that if it did confift wi^h 
my eor^^iency^ they had a mind to come and give 
m^ a^ vilit ^' I did agree to it, but was afraid that I 
flie«ald pQt procure any of thefe Tadpoles, becaufe k 
was then late in June:^ to (hew thefe Gentlemen the cir- 
cul^iion oi the Stood ("which ali learned men divc^ in- 
(Qj an4 that the more, becauf(?: tjiefe Tadpoles axe apt 
{(^ lye ^uieterthan Eels, and C?f ondly becaiife one xmj 
more: ejsa&ly difern the Arterks from the Veins in 
them tl^an in ajny other Animal.^ and then becaufe even 
ia thi? fm%lleft Qr thirmeft V^iii? on? ■ jnay fee the red 
^obijl^? of the Blood mxk., ; f^tttp" alundcr. 
Thefe 'yadpolfs^wefe ,of fev-eral fizes^ for thebiggefl: 
of them were arrived: t§ fuch^ a magnitude, that their 
hindmcrfl Leg^ began tO; ftick out irora their bodies 5 
the fmalleft of the^ were no biggqrj than that thirty 
of thpig- together: mad:e^l:Hit tfie bignefs of one great 
one : From whence we iiayft conclijidie,; that the Frogs 
lay their Egg?^ fey titnery flojwly, for then it was already 
abo^ta mc^nt^Si time agoEQ th^t I had made my obfcr- 
T^ions about the#, when there ^was fome amongft 
thw that^t jij^ged to be: h^ll- grqwis.; , :ii09 ano uv. \ 
A a a a The 
