(i8o) 
be fufpeded fa to afFeft them, as to occafion Deatb, 
tho' not by ftopping the Circulation. \ ' 
And, as to Suffocation from a Catarrh, inftances of 
this Kind, with Anatomical Obfervations on them, have 
not (to me at leaft) occur'd, fufEcient to prove, what 
was intended by this Argument. 
, Wherefore, that a Noble Propofition may not want 
Evidence, and that the Opinion, my Learned Country- 
man has fo ingenioufly defended, may for ever obtain, I 
pitcht on the following Experiment as Luciferous, and,^ 
I hope it will appear decifivc of the Matter. 
I took a large, middle aged^ healthy Dog; and, ha- 
ving freed the Trachea from the adjacent Parts, cut it off 
juft beneath the Pomum Ac/ami, and turn d the loofe End 
outward. After fome time allowed him to recover the 
prefent Concern ; with a Cork, got ready on purpofe, 
I ftopt up the Trachea, binding it clofe to the Stopple. 
Some few, but violent Struggles fucceeded ; in which 
the Sternum Was raifed, as in the deepeft Infpiration; 
and thus he died. From the Stoppage of his Breath, to 
the laft Motion I could difcern in any Part of his Body, 
was, from a Watch, obferved to be the Space of Two 
Minutes, I then immediately threw open the Thorax; 
where I faw the Blood Stagnating in the Lungs ; thc^r- ; 
teria Pulmnaris^ the: Right Ventricle of the Heai't, with . 
its appending Auricle, and the Two great Trunks of the 
Cava, diftended with Blood, to a Degree cxceffive: The 
P^ena PulmonariSy Left Auricle and Ventricle of the Heart, 
in a Manner Empty ; not containing fas near a$ I tzvi 
guefi) more than One Spoonful of Blood. •^'^- 
This Experiment proves. That the Refpiration prp-^ 
motes the Paflage of the Blood thro' the Lungs ^ fnd 
that in Bodies full of vigorous Bloody it is, oa ihis AjC- 
couat of perpetual Neceffityi^" J "-^-^^ 
This. 
