made on Men and Animals. 135 



animals, whether warm or cold blooded, is not equal in all, 

 though in general the products are equal. 



JII. Experiments viade on a Man decapitated on the 1 8th 

 of January. 



Thermometer 6-1°*; barometer 27 inches; pile 50 disks; 

 solution, muriate of soda, 



A robust man, aged thirty, was decapitated at forty-six 

 minutes after eleven, on the 18th of January. The body 

 was immediately conveyed to the hospital of St. John, 

 where it arrived at fiRy-nine minutes after eleven. Th^ 

 thermometer was at 7°^ and the barometer at 27 ipches : 

 the pile was composed of fifty pairs of disks, and the paste- 

 boai'd was moistened with a solution of muric).te of soda. 

 The fijnes of experiments were immediately begun, 



The fir.-t was to excite the diaphragm without applying 

 an armature to the spinal marrow, as is generally done. 

 Having applied the conductor of the positive part to the 

 spinal m;' row, a:.d that of the negative to the pit of the 

 stomach, previously nioislcned with the solution of muriate 

 of soda, the movements excited in the diaphragm were very 

 stromr, and those of the heart were no less so. The lungs 

 performed several expirations, charged with vapours which 

 at each expiration covered with aqueous drops the surface 

 of a glass plate oven when the conductors were no longer 

 applied. The movements of the heart, v.'hich had been ex- 

 cited by those of the diaphragm, continued for three mi- 

 nutes, and were distinctly felt on applying the hand to that 

 r?;gion, 



Eighteen minutes after decapitation the cavity of the 

 thorax was opened, and the diaphragm was then irritated 

 with the point of a scalpel : the movements were sufHciently 

 strong to excite also the heart j biit the movcnients of the 

 latter could not be preserved by that stimplus as they 

 were by the pile, even when the conductors were no 

 longer in contact with the beforp-mentipncd parts. I then 

 applied, as before, the conductors to the spinal marrqw and 

 the diaphragm, and the contractions excited were so strong 

 that the h^art was put in motion for five minutes. 



Having rernovea the left lung to uncover the thoracic 

 0orta, 1 applied the conductor of the positive part to the 

 heart, ana that of the negative to the aorta. The niove- 

 fiicats of the former were very brisk, and were exccedinglv 



• 6'5 of Rcaiim. = 43-7 F;ihr, 



\ 4 tftrikin^ 



