PLATE 2 
EXPLANATION OF FIGURES 
2 Kidney of kitten, same as figure 1. Tangential section shows cross-section 
of medullary segments of proximal convoluted tubule rays. Photograph, X 44. 
8 Kidney of cat, 48.5 em. in length, very fat kidney. Radial section of tissue 
fixed in Flemming’s fluid shows labyrinth intensely black, medullary rays un- 
stained. Photograph, X 16. 
9 From kidney of kitten, same as figure 1. Transection of tubules from 
tissue fixed in 10 per cent dichromate and stained in sudan III shows granular 
and homogeneous rods of ascending limbs, stained mostly at periphery, few solid 
granules, granules in descending limb and collecting tubule. Projection draw- 
ing, X 800. 
10 Kidney of cat, 46 em. in length, little abdominal or subcutaneous fat, 
liver pathological. Kidney light in color.. Transection of tissue fixed in 10 per 
cent dichromate, stained in sudan III. Shows vacuoles in proximal convoluted 
tubules, rods, and granules stained in ascending limb of medullary loop. Pro- 
jection drawing, X 800. 
11 Transection of tubule of ascending limb of medullary loop of kidney of 
puppy, 23 cm. long. Tissue fixed in 10 per cent dichromate and osmic acid, and 
shows granular rods staining black. Projection drawing, X 800. 
12 Same as figure 10. Transection of proximal convoluted tubule and medul- 
lary segment to show vacuoles and granules staining with sudan III. Pro- 
jection drawing, X 800. 
13 Transection of medullary segment of proximal convoluted tubule and 
ascending limb of Henle’s loop. Compare figure 1. Tissue fixed in 10 per cent 
dichromate and osmic acid with heat. There are here shown granular rods 
staining black in the ascending limb. Projection drawing, X 1200. 
14 Transection of tubule of kidney.. The same as figure 5. It shows linear 
arrangement of lipoid granules in the proximal convoluted tubule. Projection 
drawing, X 1200. 
