Compressed Air; O., Poisoning 



741 



one side, the eyes protrude, the pupils are dilated, the jaws are 

 clenched. Ophthalmoscopic examination shows copious hemor- 

 rhage at the back of the eye. Soon there occurs a sort of relaxing 

 to which succeeds a new fit of stiffness with clonic convulsions re- 

 sembling both a strychnine crisis and an attack of tetanus. These 

 fits during the intervals of which the dog does not relax completely, 

 but remains in opisthotonos, breathing with great difficulty, check 

 the respiration, the heart still continuing to beat, although often 

 with surprising slowness; the arterial pressure drops considerably. 

 Sensitivity remains and one can excite new convulsions by it. After 

 some time, these convulsive periods, which at first appear every 

 five or six minutes, become rarer, then less violent; the stiffness 



'J.iSjifip^uh 



Fig. 61 — Dog during the tonic convulsions of oxygen poisoning. 



