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piece from it,as Fig. or 3«^ \ and fct it to the pin of my M 
crofcope, havingfirfta htcle wetted the pin with my fpittle 
ora little turpentine, tbmakethepipe flicl^ toit ; or elfe 
talie the whole Glafi-pipe, and with my hand hold it befo 
theMicrofcope. Now infjchaG!afs-pipe, the blood ont! 
furface, and that which isimderit, is almofl: of the fame c 
lour, although it ftarM apretcy whilein ic , becaufe the GI 
buls inthe Glafs-pipearebut few, nor lye they fo clofe togel 
ther. The flenderer the pipe is , the higher ^vjli the bio 
rife into it. And that the Curious in your parts might thei 
felves fee this, I have ufed the freedom of fending you feme 
the faid hollow Pipes, by the means of which I hope my 
bove-mej?tion'd fpeculations will be verified, 5 
TheredGlobulsofthe Blood I {-eckontobe 25000 time 
finaller than a grain of fand i which perhaps will to many feei 
incredible: But the matter being about figured Bodies, 't 
known, chat, two Globes being given, the Axis of one whew 
of!S I, |ind that of the other, 20 , the proportion betw^e^ 
their m.a^tiitudes is i% i to 8000^^ .Spheres being in a triplic; 
proport|i)n to their jpiameterg^ "The fame red Globuls, whe 
they are tingle, and ffick within to the fides of the Glafs-pipe 
will appear white and colourlefs» 
3, Fuijcher, if yojiirCuriofityiliall lead you toobferve t 
motion df thofe red (globuls thorow the Cryflallin liquor, 
pleafed tji take one pf^t he thicker fort of thefe pipes , fillin| 
!|t with blool from E to and fo putting the Icwat" 
• ^cndB* a little into the flame of a Candle, and clofin| 
it hermetically. Which done, fet >the pipe upright, witS 
the end 4 upwards, ]tfiat fo the red Globuls may fink. And 
defiring op fee the motion of thofe Globuls, apply a litt||i 
warmth t(?| the pipe.between F, B, making ufe only of a want 
hand ; b/ which w^armth the Air betwixt F,B, muft expand 
it felf intQ a greater fpace, and the blood in the pipe wilt 
be^rivenyp higher ; by which means the red Globuls willitr 
.^pjrt comt?]to move above in the Cryftallin humidity; yet if 
thpfe Globuls come to joyn themfel ves too cloj(^,tQg^therj thij 
Obfervatia^ will fail. r ; ^ 
le 
4. 1 
