136 DISEASES OF THE LUNGS. 



made in elucidation of this subject by the French veterina- 

 rians, Dupuy, Dolafond, and Haraont, we are enabled to 

 speak with still more confidence and certainty. 



Dupuy injected into the right cavity of the chest, 

 between the eleventh and twelfth ribs, two drachms of 

 oxalic acid dissolved in three ounces of water. Shortly 

 afterwards, the animal commenced pawing with his fore feet, 

 looking at his flank, which had become in a sweat, lying 

 down and rising again almost immediately. The respiration 

 and pulse became quickened, the temperature of the skin 

 augmented, and the pulsations of the heart accompanied by 

 a remarkable sound. On applying the ear to the side and 

 upon the windpipe, a sound was heard similar to what 

 rubbing dry parchment together would produce, and besides, 

 the sound of fluid within, particularly on the right side. 

 The next day the sound of fluid had become still more 

 distinct, and yet the animal appeared better and commenced 

 feeding; the third, the pulse and respiration were more fre- 

 quent, the latter also short and embarrassed, and threatening 

 suff^ocation. On the fourth day the pulse became inter- 

 mittent, as well as the pulsations of the heart, which were 

 now more distinct on the right than on the left side. Fifth 

 day, pulse feeble and intermittent, respiration impeded, ' 

 pituitary and conjunctive membranes violet-coloured, skin 

 bedewed with cold sweat. The breathing gradually became 

 more embarrassed, and the animal, growing weaker and 

 weaker, died without a struggle. Pleura of the left (right ?) 

 side covered with false membrane, yellow, consistent, and 

 several lines in thickness; about ten litres^ of grey serosity 

 within the cavity, floating in which were flocks of lymph ; 

 pericardium covered with false membrane, and containing 

 several litres^ of bloody serosity. 



This experiment, several times repeated, constantly 

 off'ered the same results. Among others, one horse, de- 

 stroyed fifty hours after having been injected, contained 

 twenty-five lity^es of citrine serosity, with yellow, thick, false 

 membrane enveloping the costal and pulmonary pleurae. 



' The French litre is rather more than 1| of an Enghsh pint. 



