PLATE 64. 

 Mycobacterium lacticola a planum. L. and N. 



I. Streak culture (ordinary agar), two months at 22. 

 II. Streak culture (glycerin-agar), six days at 37. 



III. Streak culture (glycerin-agar), three months at 22. 

 The culture at first is whitish; later, it becomes very in- 

 tensely orange-red. 



IV. Streak culture (gelatin), six days at 22. 



V. Potato culture, six days at 22. Its appearance 

 varies widely. Sometimes it is lighter, sometimes darker, 

 sometimes moister, sometimes drier, sometimes smooth, 

 sometimes wrinkled. 



VI. Plate culture (gelatin), six days at 22. X 60. (a) 

 Superficial colony, resembling the colon ; (b) deep colony. 



VII. Plate culture (gelatin), six days at 22. Natural 

 size. 



VIII. Plate culture (glycerin-agar), three days at 37. 

 X 60. Superficial colony. 



IX. Plate culture (glycerin-agar), three days at 37. 

 Natural size. 



X. Microscopic preparation. Glycerin-agar, three 

 days. X 1000. Stained with fuchsin. The size of the 

 rods scarcely varies in very old cultures. There as here are 

 found small and large, slender and thick rods. 



