| F 
; 
pe Ble thei ' 
daally weakened, there j is no time for the pulmonary a 
to become diftended, as when general death be egins in the 
foes or in the brain. I have already collected ones 
inftances of perfons who have died by fyncope, in whom the 
lungs were found in this empty ftate. In general, whenever 
death has begun in the heart or large veffels, and has been 
fadden, the emiptinefs of the pulmonary veflels m 
garded.as a general phenomenon : 
the hemorrhage of large wounds, from aneurifmal ruptures, 
violent emotions, &c: ave obferved it in the bodies of 
perfons guillotined ; and it is equally vifible in animals 
flaughtered. for food.”? 
The faltuenbe of the lungs on the heart will be confidered 
under Lux _— 
* The heart’s a€tion is fubje& to that of the brain, fo on 
the eefation of the latter interrupts the former. In explain- 
ing how this takes place, Bichat obferves _ ¢ moft les 
ficians fpeak too’ vaguély of nervous influence, and do not 
determine with fufficient precifion its extent ey “Tinits with 
to the various organs, 
that the brain exerts no immediate isficnind on 
while the latter preferyes the former in a {tate of dependance 
by the metion which i i 
new; all good phy fiologifts admit it; but as feveral medical 
opinions proceed on an demon- 
Pedices ps tt me ot affeéte 
nifhed. 3dly. Opium and. w. ine, in a certain doe have a 
temporary effet j in dimin nifhing the cerebral energy, and ren- 
dering it lefs capable of executing the functions of the animal 
life: the heart continues to aé&t as ufual, and fometimes its 
contractions are increafed. 4thly. Palpitations, and various 
r motions of the heart, are not derived from the 
. What would be ‘the 
tenure of » if 1 we could fu tea at pleafure the action of 
which is its main fource? Death might be then 
ne ton by a fimple a& of volition. Thus mere obfer- 
on would authorize us in inferring, without much fear of 
ec, that the ceffation of the heart's a¢tion, eonfequent on 
the interruption of the cerebral sagen = ns, does not arife from 
infl further fupport 
ology and wean by 
ving 
of % 
ceffethe of the darious pro- 
Mette i yes as i 
- powers. Moreove 
— ewan it will be impo ble to overlook the 
of the animal and 
hen 
r tal omena ; 5. arrival 
7 ates 
not difcern the leaft motion of the heart, when the fpinal 
ganglia or the par 
vagum on one fide, and the heart on the other were armed, 
and the communication made between them. Yet tire 
cali irritation caufed ‘iidadediaes of the heart. 'The 
periments on dogs and guinea-pigs, in which the = “alfo 
was tried, had the fame refult: when the communication was 
made between the two metals, it neither accelerated the 
heart’s motion if it {till continued, nor reanimated it if it 
had ceafed. Experiments on ‘the cardiac nerves and the 
heart of two living dogs produced no y ery apparent 
otions. 
Humboldt Pape os when the heart is detached’ fud. 
denly, fo as e of its nerves on ed, contrac. 
tions may “i produced Sy arming them with one metal, 
ss this with nod [ have tried this ‘onfidoststalty 
many times: yet it appeared to fuccee ce. e only 
heart, with efficacy and pregae 
a warm-blooded animal ; 
I have ve repeated all thefe experiments on galvasif many 
times, and with the 
fome celebrated enquirers have obtained. Every one knows 
how variable are the effects of a tacoreaas on the vital 
if the reports of o experimenters. 
itriking 
difference between the mufcles and organic 
lives in reelpetites vanic excitation. An excellent method 
of pi mete this 18, when w 
uced on t eart 
mufcles, and thus to eftablith a parallel between 11 
kinds of organs. 
Since then the ceffation of the heart’s action, seb 
on great lefions of the brain, is.not direct, although i it comes 
on immediately, there _ an intermediate organ, the 
' brain; 2, paralyf : muicles, and confe. 
laid quently of f the lap ann intercolals 3, fufpenfion of. 
’ the mechanical a of refpiration; 4, of the chemi- 
of b bleskibisadnt the fibres of 
6, debilitation of thofe fibres and ceffation of 
death, which Nicceeds ferious injure of. the dike, 
has estar confiderable “1 gy to the different afphysciee : 
3V2 is 
