f 23 ) 
at the end M with a hole as fmall as a hair , imaglni«g , that if 
by the Forcer K H I fliould force up cowards L the water thaS 
is between IN, that then the particles driven out of the inner-' 
Glafs, and being bigger than thofe which by thecontiiiua! 
Ethereal motion pafs through it, and paffing into the exterior 
Glafs, would there require more fpace, and confequenily drive 
out fome Air at the little hole in the exterior pipe at M : And 
to fee the event hereof, I did put in the outermofl: pare ef the 
fmal] hole M a little water , which filled the hole only on the 
foremoft partof it, thinking, that as I fiiould drive the Air 
out of the innermoft Glafs , the fame paffing into the exterior 
Glafs, would thrnft the water out of the little hole. But what 
motion foever I make with the Forcer KH, andprefsout the 
Air N L, the water at the fmall hole M keeps its ftation s and 
yet, if I do but apply my warm hand to 1^ exterior pipe 
MG, the water at M prefently flies out. This puzlesme, nor 
can I find a fatisfaftoKy xtdXonioT iHis Phmomemf^. 
More (^ierofi0pkal Ohfervations made by the [me M. Lee- 
w^enhoeck, and promifed in Numb.9 7. of thefe TraBs ; Com' 
municAted in hii hetters of ' Auguft i s . 1673. of April 7. 
1674. 
I, T Have divers times endeavoured to fee and to know , 
what parts the Blood confifts of 5 and at length I have 
obferv'd, taking fome Blood out of my own hand, that ic 
confifts of finall round globuls driven thorough a Cryftalline 
humidity or water; Yet, whether all Blood be fuch, I doubts 
And exhibiting my Blood to my felf in very fmall parctls,the 
globuls yielded very little colour. 
2. I have likewife obferv'd fome of the fweet Milk of 
Cows, and find that alfo to be made up of fmall tranfparent 
globuls, carried in the fame manner as in the Blood thororgh a 
clear liquor, 
3. I have alfo viewed in my Microfcope fome of the Hair 
of my own Head, which heretofore I imagined to have fecn to 
grow out of globuls, that are not driven out to the end ^ as I 
obferved it was done in Trees and Plants , but that they united 
in the skin, and in the root of the hair ; fo that Hair grows 
D 2 and 
