178 



F. E. HENDERSON, 



stimulation), or the blood-pressure remaining constant a local shrinkage 

 will cause a like fall (stimulation of renal nerves), or the further possible 

 case, fall in blood-pressure with accompanying fall in ureter-pressure. 

 Decapsulation only to a certain extent does away with this effect (Fig. 2). 

 In consequence of this lack of complete elasticity on the part of the 

 capsule and of the varying volume that the vessels may fill within it, no 

 absolute measure of the ureter-pressure at any time can be made unless 

 the ureter manometer connections have been opened and the kidney 

 freed from pressure since the last change in local vascular conditions. 

 A slower fall in blood-pressure caused by a slow general vaso-dilatation 



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Fig. 3. Fig. 4. 



Fig. 3. Exp. XXV. Dog. Upper line, oncometer; 2nd, blood-pressure; 3rd, ureter of 

 oncometer side; 4th, secretion from right kidney; 5th, signal; 6th, base for both 

 manometers, time in 10 second markings. Stimulation of vagus and of left 

 splanchnic, i.e. of oncometer side. xj. 



Fig. 4. Exp. XXVI. Dog. Upper line, plethysmograph of left kidney; 2nd, blood- 

 pressure; 3rd, ureter-pressure; 4th, signal; 5th, base for both manometers, time in 

 10 second intervals. Stimulation of renal nerves. x\. 



