Glomeruli and Tubules of the Kidney accompanying Activity. 599 



Hence 



Mean diameter capsule 11 80 127'1 



glomerulus 100-8 106-5 



Approximate volume capsule 205 257 



„ „ glomerulus 128 151 



„ fluid 77 106 



Convoluted tubules — 



Proximal. External diameter ... 440 480 



Lumen 130 19-8 



Distal. External diameter ... 33 - 2 39 - 2 



Lumen 24-8 292 



grin. 



Weight of R kidney 20-6 



„ L. kidney 19-1 



The two kidneys show the general changes of a diuresis in a well-marked 

 manner. The experiment further shows that the effect of decapsulation is 

 to cause a relatively greater expansion of both capsule and glomerulus. Also, 

 the capsule is not so well emptied as in the normally active kidney. The 

 difference in the dilatation of the convoluted tubules is again in favour of 

 the decapsulated kidney. This is particularly seen with regard to the lumen 

 of the proximal convoluted tubule. Whereas the ratio of the external 

 diameter of the first convoluted tubule of the decapsulated kidney to that 

 of the free kidney is 1 to 107, the ratio of the lumina is 1 to 1-53. 



Hence we may conclude that decapsulation results in an increased 

 distension of all the cortical parts of the kidney tubule when it is thrown 

 into activity. 



In the next group of experiments one of the kidneys was obstructed. The 

 group comprises three comparisons. 



IV. Comparison of a Besting Kidney vrith an Obstructed Kidney. 



Expt. 12. — E. kidney resting. L. kidney obstructed. 



R. L. 



ft. p. 



Glomeruli and capsules — 



Equatorial diameter 98'4 130'4 



Polar diameter 760 111*2 



Space 1-2 24-8 



