PLATE 7 
Large sporulating cells. 
Fig. 73.—Typical large sporulating cells. Azotobacter Beijerinckii (No. 3). Potato, 
2 weeks. 
Fig. 74.—Microcysts and vegetative rods.— A. ckroococcum (No. 25). Beef agar, 
1 week. 
Fig. 75.—-Branched rods and threads. A. Beijerinckii (No. 3). Beef agar, 12 days. 
Fig. 76.—Threads with different segments. A . Beijerinckii (No. 4). Beef agar, 
2 weeks. 
Fig. 77.—Threads with gonidia and regenerative bodies. A. Beijerinckii (No. 3). 
Beef agar, 5 days. 
Fig. 78.—Thread segmenting to globular cells. A. ckroococcum (No. 18). Mannite 
soil extract, 3 weeks. 
Fig. 79.—Globular sporangia producing 1 to 3 spores. Bacillus danicus (No. 34). 
Mannite-nitrate agar, 2 weeks. 
Fig. 80.—Globular cells dividing to 2 curved rods. A. ckroococcum (No. 20). Potato, 
1 week. 
Fig. 81.:—Branched sporangia. A. chrococcum (No. 25). Mannite-nitrate agar, 
3 weeks. 
Fig. 82.—Sporulation replaced by gonidangiaformation. A. ckroococcum (No. 20). 
Potato, 1 week. 
Fig. 83.—Beginningendosporulation of large rods. A. agile (No. 16c). Beef agar, 
3 days. 
Fig. 84.—Regeneration of large globular cells from symplasm. A. ckroococcum 
(No. 25). Potato, 1 week. 
