C 380 ) 
rf^otrt a cavity^ others lie crofs a cavity, as G. All thefe particles 
were eminently tranfparent. 
About J,B',C,Z>,there are near the edge of the Nerve fome tranf- 
parent winding ftroaks. 
Other ^^krofeopcdOhjervatims^ mudebj the fime^ ahout the tex- 
ture of the Bloody the Sap of fome Plant s^t he Figure of Sugar and 
Salt J and the probable eauje of the difference of their tajls^ 
IN my former I told you, how that the clearer aqueous matter 
of the Blood, being that Liquor in which the red fanguineous 
globuls fwim, doth likewife confifl: ofglobuls; and that I had 
obfervcd fuch in that aqueous matter, when the moifture was fome- 
what , or for the moft part, exhaled. But now I cannot omit to 
acquaint you, that a few dales after I had fent away that Letter, I 
faw the plain globuls move in that waterifli matter without any e- 
vaporation made ; though there were but very few of them, and 
they appeared white where they lay together. And on this occa- 
fion I very wel! remember, that, about two years ago, I divers 
times obferved my own Blood, and noted, that thofe fanguineous 
globuls that make the Blood red, feemed then to be firmer and 
iiarder than they are in my Blood now ; at whieh^ time my Body 
was very much indifpofed, fo that I fell into a ficknefs, which 
held me near three weeks t But now I find thofe globuls of my 
- Blood fofter, and more (licking to one another , and my Body in a 
good ftate of health. I know not, whether fome fickneflfes, and 
even death it felf, may not fometimes proceed from the hardnefs of 
thofe globuls. I am ape to imagine, that thofe fanguineous glo- 
' buls in a healthy Body muft be very flexible and pliant , if rhey 
ILall pafs through the fmall capillary Veins and Arteries , and that 
in their paffage they change into an oval figure , reaflTuming their 
roundnefs when they come into a larger r-oom. 
Befides this , I have obferved in the clear matter of the Blood 
figuresof a quadrangular form, which I foppofe to befomefalin 
parts; further to be examined hereafter.. 
But I fball proceed to giveyou an account of the Obfervati- 
ons I have made of the Sap of fome Plants. Arum {Wake-robin) 
being tafted by me, and found very fltarp upon the tongue, I found 
by my Microfcope, that the Leaf thereof did confift of globuls 
Bot exai^y round, and thefe again of particles incomparably 
fma'ler 
