38 ON THE NATURE AND ACTION OF THE 



Experiment XL 



October 28th, 1872. — A fresh supply of poison was received 

 from India. It was of a yellowish colour, and was hard and 

 dry, like tough cheese. About half a grain diluted with alcohol 

 (in which it was only imperfectly soluble), was injected into the 

 thigh of the same guinea-pig at 4h. 14' 30". 



4.15. Twitchings of an emprosthotonic character. The animal 

 is apparently attempting to vomit. 



4.20. The twitchings continue. The animal throws up its 

 head. It seems sluggish, and will not walk. 



4.22. A mixture of 5 minims of liquor ammonise with 10 of 

 water was injected into the animal. Almost immediately after- 

 wards it became convulsed, and fell over on its side, paralysed. 



4.25. It is dying. 



4.26. Quite dead. 



4.27. The cardiac pulsations and peristaltic action of the 

 bowels still continue. The blood, when collected in a vessel, 

 formed a firm coagulum. 



4.32. Peristaltic action diminished. The muscles of the leg 

 contract when the sciatic nerve is stimulated by an induced 

 current. Electrodes were then placed in the cord. The muscles 

 of the legs contracted readily when an induced current was 

 passed through the cord. One cell was employed, and the 

 distance of the secondary from the primary coil was 44 cm. 



Experiment XII. 



May 19th. — A full dose of dried cobra-poison was diluted 

 with distilled water, and heated until it was filled with white 

 flocculent coagula. 



The solution was injected into a guinea-pig's hip at 3.25. 

 Twitching began almost immediately. 



3.30. Eestless. Hind leg paralysed. 



4. Twitching acute in hind leg. 



4.10. Active hip-twiching, but hind leg still paralysed. 



4.15. Making efforts to vomit. 



4.25. Vomiting repeatedly. 



4.30. Distinct repeated convulsive attempts to vomit. Limbs 



