DESCRIPTION OF PLATES. 



PLATE I. 



Fig. 1. — Poisoning by venom peptone of Crotalus adamanteus. Local appearances on section 

 after death. 



Fig. 2. — Poisoning by venom peptone of Crotalus adamanteus. Local appearances after death 

 and before laying the part open. The cedematous prominent swelling is well shown, but is 

 made rather too darkly red. 



Fig. 3. — Local effects of venom peptone, when the poisoning is chronic. The grayish semi-gangre- 

 nous muscles are shown in contrast with the uninjured muscle of the opposite side. 



PLATE II. 



Fig. 1. — Extensive local lesions after death from venom globulin (dialysis globulin). From Crotalus 



Adamanteus venom. 

 Fig. 2. — Local lesions after death from a solution of dry Cobra venom — rabbit. 

 Fig. 3. — Contrast with Fig. 2 the profound local change caused in a rabbit by venom of Crotalus. 



In both cases fatal results took place in two hours, the doses having been small. 



PLATE III. 



Figs. 1 and 2 exhibit the increased adhesiveness of human-blood globules when the fresh blood has 



been mixed with fresh venom. 

 Fig. 3. — Naked-eye view of loop of mesentery in a cat showing effects of local application of venom 



of Crotalus. Extensive hemorrhages separate the two peritoneal layers, and are seen to have 



oozed through them freely. 

 Fig. 4. — First microscopic appearances of hemorrhage from capillaries of mesentery of cat. 

 Figs. 5, 6, 1. — Successive stages of increasing loss of blood. 



PLATE IV. 



Microscopic appearances of human blood on being mixed with fresh venom. The alteration in form 

 and the elasticity and adhesiveness are well shown in Fields 1, 2, and 3 — Photographs by Dr. 

 Geo. A. Piersol. 



PLATE V. 



Extensive hemorrhagic lesions in abdominal organs of etherized rabbit poisoned by intra-peritoneal 

 injection of venom of Crotalus adamanteus. 



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