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Fig. loO. Illustration showing the appearance of the blood-vessels in the ears of a 

 white rabbit. (By permission of Seelig and Joseph.) "To show the contrast between the 

 constricted vessels still connected with the vaso-constrictor center (left ear) and the control 

 dilated vessels that have been disconnected from that center (right ear). Drawing made 

 late in the experiment when the animal was apparently in a state of deep shock. The strong 

 vaso-constriction in the left ear was replaced by a wide dilatation as soon as the connection 

 of this ear with the vasomotor center was severed." (From Seelig and Joseph: Jour, of 

 Laboratory and Clinical Medicine, 1916, i, p. 283.) This illustration shows the continued 

 marked activity of the vaso-constrictor center in the ears of animals when they are apparently 

 "in a state of deep shock." The student is urged to be constantly on the watch to see if 

 he can observe a similar action of the center on the vessels of the kidney, spleen, or intestinal 

 loop as indicated by the character of the oncometer records in animals which do well in the 

 early part of an experiment but pass apparently into "a state of deep shock" in the later 

 stages of the experiment. In this case how would the oncometer records be affected? 



