Royal Socie^tv; 463 
fort of thefe animalcules could not remain at the bottom, but were 
generally carried towards the furface of the water, and there they 
continued hanging by two horns that came out of the upper part 
of their bodies • and when they would fink, they had a ftrong 
and vehement motion, by means of a tranfparent inftrument fixed 
on the end of the tail ^ the two Ibrts of gnats proceeding from 
time to time from thele animals had flings- they placed them- 
ielves upon the glals, and fometimes alfo fat down upon the 
water, Ipreading out their long legs thereon ^ M. Lesivenhoek 
obfervcd feveral round particles of the bignefs of a large grain of 
land drive and move in the watery and when he brought thefe 
particles before the magnifying-glafs, they not only appeared 
round, but had the outward fkm let over with feveral protube- 
..rant parts, which feemed to him to be triangular and' pointed 
' towards the extremity ^ {b that on the great circle of one of thefe 
round bodies ftood fuch convex or protuberant particles, orderly 
and equally let from each other to the number of 2000^ which 
never ia^ fall, and their motion proceeded from their turnin<» 
round, die fmr^iUer the particles were, the greener was their co- 
lour, and e conrrd in the particles as big as a grain of fand, there 
was no green colour at all difcernible on the outfide j each of 
thele particles included 5, (J, 7, nay fome 12 fmall globules, of 
the lame jhape with the body wherein they were included: 
Among the reil M. Lee'wenhoek perceived that the outward part 
of on.- oi the largeft particles began to open, out of which, one 
of i^L.: included globules of a delicate green colour, flipped out, 
and ' -gan to move in the water, as that part had done, out of 
which it proceeded^ after this, the firft round particle remained 
without any motion at all 5 and foon after, the fecond and third 
particles flipt out one after another, 'till they all by degrees came 
out 5 after the fpace of fome days the firlf round particle united 
again with the water, for M. Lee'wenhoek perceived no fignsof 
it 5 and in all the motions of the firfl round particle, he could not 
obferve that the included particles changed their place, nor touch'd 
one another, but remained equally diftant : As there was a great 
many of the faid round particles in one glafs, wherein were alfo 
feveral living creatures, he obierved that m three days time they 
all difappeared, io that he could not difcern any of the faid par- 
ticles in the glafs: M. Lee'vcenhoek had a glafs-tube of about 8 
inches long, as Plate XIII. Fig. 2c. of the thicknels of a goole-quill, 
wherein he put lome drops of water, as CD 5 he left one end at A 
open, and the other endB he flopped with a piece ofcork,^ that 
between D and B was nothing but air, which being ihut up in the 
tube 
