Glomeruli and Tubules of the Kidney accompanying Activity. 603 



An examination of the figures brings out an enormous increase in the size 

 of the capsules, due chiefly to the increase in the amount of the fluid 

 contained. The effect upon the convoluted tubules is again most marked. 

 Otherwise the figures require no further comment. 



The right kidney was not completely at rest, as was indicated by the 

 microscopic appearance of the glomeruli. In every instance there was fluid 

 between the glomerulus and the capsule. 



YIII. Comparison of a Free Kidney with a Decapsulated and Obstructed 



Kidney. 



Expt. 1. — E. kidney free. L. kidney decapsulated and obstructed. 



E. L. 



Glomeruli and capsules — 



Equatorial diameter 135 - 6 143 - 6 



Polar diameter 106-8 125-6 



Space 23-8 3P6 



Hence 



Mean diameter capsule 121-2 134-6 



„ „ glomerulus 97'4 103-0 



Approximate volume capsule 223 305 



., glomerulus 116 137 

 fluid 107 168 



Convoluted tubules — 



Proximal. External diameter ... 48-2 51 - 4 



Lumen 13-2 24'0 



Distal. External diameter ... 38-6 39 8 



Lumen 29-0 30-8 



The general result of the experiment shows that the glomeruli and 

 convoluted tubules are more distended in the decapsulated and obstructed 

 kidney than in the free kidney. In this instance the volume of the capsules 

 became enormous, with only a slight increase in the volume of the glomeruli. 

 We would emphasise the very great size of the lumen of the proximal 

 convoluted tubule. 



Expt. 4. — E. kidney free. L. kidney decapsulated and obstructed. 



R. . L. 



Glomeruli and capsules — 



Equatorial diameter 137 - 6 152-4 



Polar diameter 1124 122-4 



Space 104 22-0 



VOL. LXXXVIL — B. 2 Z 



