( <5 i ) 
from the rednefs of the Fibres and F'tbrilU of Animals, which 
have a red Flefli ; which will be no furprize to them who have 
read Mr. Leeuwenhoeks Letter 42,, where he (ays, that thefe Glo- 
bules do divide themfelves after thismanner, to pafs thro’ the 
lad Extremities of the Capillary Arteries of the Brain; nor to 
thofe who know, that the Globules are extreame foft and eafily 
feparable, as Meunfieur Mu-js has evinced by Arguments groun- 
ded on very curious Obfervations. 
Monfieur Muys has added to his Obfervations very exad Fi- 
gures, which contribute very much to the forming a clear and 
didind Idea of the Strudure of thefe Fibres of the Mufcles, 
and of the manner of the Arteries pafling through them? but 
I dare not fo far depend on my Skill in defigning to venture 
to Copy them 
This knowing Perfon has alfo made feveral Difcoveries 
of the Courfe and Ramifications of the Nerves in the 
Mulches: But I wait for an Opportunity of informing my 
felf better of feveral Particularities, before I communicate 
them to you. 
In my lad I wrote to you concerning the Salts which 
Mr. Muys had difeover’d in Human Blood ; but I had for- 
got to inform you, that he had found out a way to feparate 
them from the B'ood, without any Chymical Aualyfrs, and 
without making them undergo any change, and to form them 
into Cridais, vifible without a Mierofcope; as he has (hewn 
to his Students in Phyfick. 
IV. An 
