( 14^8 ) 
be nouriflied be of fuch a ftru£ture, as cafily to admit the Sub- 
ftances to «be appofed, and let them pafs ofF when effete. Secondly, 
that it be bounded ^ thirdly, that it (hould have a reftitude of 
paflages fourthly, that the protrufion of the nutritious Matter 
fhould be continual ^ fifthly, that it fliould be flow. 
Which confiderations premifed ^ He thinks, that the former fort 
of Suhftances v thofe of jhe Blood) are the Matter of vSweat, ^the 
latter ( thofe of the Nutritious Juice ) are that ol Infcnfihle Per- 
Jpiration ^ Thofe to be fecreted by the Glandules ( as Machins ) ^ 
Thefe excreted by the Fibres (as fuch) and that by a hziQ protrujion 
along their trafts. 
Yet he thinks fiot that the whole Matter" of Sweat is always only 
what is fent oft^ by Secretion no more than he does that upon 
Infenfible Perfpiration nothing paffes forth but the afT/gned fuper- 
fluities of the Nutritious Juice : Since for fome reafons he afhgns, 
fomething may pafs out of either of thofe kinds of Velfels to en- 
ereafe the matter of cither evacuation. But he thinks it fufEcient 
to denominate the matter of each ftom the greater part. Of which 
vnorebelpw. 
And that the matter in general of thefe two Evacuations is diffe- 
rent^ he endeavours to prove by two Arguments. 
The Firft is taken from Experience : But he is not fo vain to urge 
his, own, but that of San^iorius^ whom all learned men value j who 
from 30 years experience, in a great many of his Aphorifms affefts 
th€ wide difference between the effe£ls of thefe two evacuations. 
But becaufe fome affirm they have feen confiderable and good 
effefls of Sweats in feveral Difeafes, and that others enjoy their 
health, notwithftanding they frequently and copioufly Sweat much, 
he endeavours in ftiort to anfwer thefe objeftions, as may be feen in 
the Difcourfe itfelf 
Second Argument he takes , from the reafon and manner of 
Nutrition : which fince fome deduce immediately from the Blood, 
but He himfelf ( as he has formerly endeavoured to prove } from 
the Nervous Juice ^ he coniiders both thefe fuppofitions, laying 
down the manner how either way the buftnefs may be prefum.ed to 
be performed : but more particularly, relying on his own Notion 
formerly delivered, he gives an abftrad of it, and then proceeds to 
fnew, how this Perfpiration may be mechanically folved from it, 
viz. 1 uppofing that the Brain , and confequently all the Fibres 
(vv^hich make up the whole body ^ and are, according to him, 
VefTels) are relaxed in fleep, and fo admit the fupplements of Noi> 
riftiment, he infers, that upon waking firft the Brain, then the 
whole 
