2C6 SIXTH RKPOttT — 1836. 



the needles. They were not afterwards able, as in other cases, 

 where curved awls were used, to find the marks of the needles 

 so as to ascertain the direction in which they had passed. 



Experiment 10. — Subject, a young ass pithed. Chest imme- 

 diately opened, when the heart was acting slowly, but forcibly. 

 At first no second sound was heard, but a bellows sound (instead); 

 then a violent action was attended with a single sound, accom- 

 panied by a bellows sound, which (latter) ceased as the heart 

 became more slow in action, after which both sounds became 

 distinct ; then, the arteries being pressed with the fingers at their 

 origins, a first sound was heard, with a blowing murmur accom- 

 panying and another (murmur) following, but no flapping (or 

 second) sound. On removing the pressure (from the arteries) 

 the second sound was heard and the murmur ceased. Imme- 

 diately after the systole a flapping or jerking sensation was sen- 

 sible to the finger applied to the arteries at their roots. 



The inversion of the auricles was accompanied by a sensation of 

 thrilling in the finger of the operator. The auriculo- ventricular 

 valves were found to act in water after the removal of the heart from 

 the body, closing on its being drawn apex upwards through water. 



Experhnent 11. — Subject, a young ass poisoned with oil of 

 bitter almonds. 



A small opening was made in the cartilages opposite the 

 heart, when the stroke was perceived, and felt by the finger in- 

 side and outside the sternum at the same time, with souiid, and 

 with considerable pressure upwards against the finger placed 

 between the heart and cartilages. 



The chest and pericardium were then opened, which latter had 

 a little serum in it. After turning over the animal on its left side, 

 so as to make the heart hang vertically (out of the chest), a first 

 sound was heard through the tube applied to the ventricles, but 

 no second sound by either observer. The same sound was 

 heard on the right auricle posteriorly without the second sound : 

 the heart acted both times weakly. The tube being applied to 

 the roots of the arteries gave the same result to one observer, i. e., 

 a first without a second sound. The animal being again laid on 

 his right side the first sound was heard by two observers. Cir- 

 cumstances prevented the third member of the Committee from 

 ausculting during this experiment, which was not repeated. 



Experiment 12. — Subject as above, and pithed. 



Heart acted thirty-three minutes. On opening the chest the 

 two sounds were heard, the heart acting slowly and with tole- 

 rable force. 



The auricles were then inverted by the fingers, and the first 

 ,80und, continued into a bellows murmur, was heard. The nmr- 



