PLATE 2 



TOXPLANATION OF FIGURES 



9 From tlu' moderator hand of a fattened hog (animal 104, table?). Fibers 

 of right limb of bundle of His, P, and light cardiac fibers, L, contain a vcru sukiU 

 amount of fat, dark cardiac fibers, D, a large amount. X 300. 



10 From the interventricular septum and left limb of the bundle of His of 

 a well nourished dog (figs. 10 to 16 inclusive from same animal, no. 90, table 

 6). Dark cardiac fibers, D, and light cardiac fibers, L, contain a muderdte 

 amount of fat; Purkinje fibers, P, contain a small amount of fat. X 500. 



11 Muscle fibers from the sino-auricular node, heart of a normal dog (figs. 

 10 to 16 inclusive from same animal, no. 90, table 6). Fat content of muscle 

 fibers small. X 500. 



12 ^Muscle fibets from the atrio-ventricular node, heart of a normal dog (figs. 

 10 to 16 inclusive from same animal, no. 90, table 6). Fat content of muscle 

 fiijers small. X 500. 



13 Cardiac fibers from the right atrium of a normal dog (figs. 10 to 16 inclu- 

 sive from same animal, no. 90, table 6), fat content moderate. X 500. 



14 Skeletal muscle fibers from the diaphragm of a normal dog (figs. 10 to 16 

 inclusive from same animal, no. 90, table 6), large amount of fat in dark fibers, D, 

 and small amount in light fibers, L. X 500. 



15 Cardiac fiber from interventricular septum of a dog (fig. 10 to 16 inclu- 

 sive from same animal, no. 90, table 6). True interstitial granules, (7 (mito- 

 chondria, sarcosomcs, Q granules), muscle columns M, Krause's membranes Z. 

 X 1600. 



10 Same as figure 15, transverse section. X 1600. 



31 



