^Ttance rWW^iin the Clieft, fo long U{\<h Infprmon\ but when the 
force of the iT^r/W^-^ Air, by means of the Contradion of the Dia» 
pbragme and its preflure, overcomes the ftrength of the hfpired Air, 
then begins and fo long lafts Expiration, So that , according to him, 
i^f/p/Wr^W is nothing eife, than a Reciprocation of the Air inclofed 
in the Cheft,and an Alternate motion of the Lungs and the Diaphrag- 
me s whereby the external Air becomes the firft origin of all the A- 
nimal motion. 
As to the Vfes of Refpiration, he cfleems,both from a certain Re- 
lation to be found in F(?;^f^;;<^, and from the ftrudure. Motion and 
Scite of the Diaphragrae, that there are other Ufes of it, than the 
Cooling of the Heart, the Fanning of the Blood, the Difcharge of 
fleams, the Conveyance of a Nitrous aliment, the Comminution and 
fubduing of the Blood, and its intimate commixture with the Chyle, 
and the promotion of the Blood from one ventricle of the heart to 
the other ^ for all this, he faith, is performed by the help of the Lun^Sy 
(which is hutone Organ ofRefpiration ; ) But then he would main- 
tain, that by the other Inftrument of Refpiration,the and 
its Preflion, there are effeded fuch other things, as are no lefs nccef- 
fary to the prefervation of life , than the former ; The con- 
tinual Preffure of the Chyle out of the flomach into the inteftins,and 
from thence by the Milky veins into the Glanduls of the Mefentery, 
and fo further into the Chyliferous Channel s as alfo the Motion of 
the Blood out of the Porta into the Liver, and out of the Liver into 
theC^z/^i and that of the Gall into the Bladder of Gal!, and thence 
into the common du^m and the Guts : perhaps alfo that thence pro- 
ceeds the firft Natural Inftind or Perception, exciting alfo the Ani- 
mal motions. 
Which being thus propofed and deduced by him, he endeavours to 
fatisfie the objedions that may bemadeagainft this Hypothefis • for 
which jand many other particulars, we refer to the Author himlelf. 
K 0 T E, 
AT the end of p. 2125. th« Bjeader is dcfired to add to prevent all jui- 
ftaiccs,what the Author of that L etter fignified ^fril xi,i6'juto the Pttbli/keff 
iince that was Printed, viz* That in a very (harp Froft the Bleeding is ftop'd till the 
weather begins to change; but in a moderate Frofl,though it ftop in the night, yet 
in the day time, if the Sun fhines our, the Trees will bleed, though the Froft con- 
tinue. What wefiid incur Letter,PrintedN^ 57, />. ii<55. /.45. that Cold did not 
promote but hinds r bleeding ; we find holds true^ if the Cold be without Froft, 
Befides, p.xiz6. atih^GndoEMr.fV^Uoughbfs Letter may be added, what he fur- 
ther imparted in the above faid Letter of 21. viZ' That fince his laft, he had 
made tryal upon and 5:;'<r/?mor^asto thctranfmittingof Water, and found, 
that the water runs through both , but nothing fo fall as thorough Birch, 
E RRA TA. In Numb* 69. 2091. /. 24. r. and purfe, 
InthisNumb.yb.p.ZizS. /. 17. r. ^xhinftant, p. 2130. /. 3. r.defcent. 
L 0 N D O N~ ~ 
f rinud ht John Mmyn, Printer to the Rojd-Sociepy. iC-ji. 
