XVI Journal of Agricultural Research voi. vi 



Page 



Platk E. Fig. 2$.— Bacillus sublilis (No. 31). Beef agar, 2 days old. Types 

 I and D formed by spores. Fig. 26.— Bacillus sublilis (No. 31). Beef agar, 

 6 days old. Formation of type I. Fig. 27.— Bacillus sublilis (No. 31). 

 Beef agar, 8 days old. Type I forming H and stained D. Spores forming 

 unstained type D. Fig. 28.— Yellow bacillus (No. 41). Peptone-glycerin 

 solution, 2 days old. Type I germinating from D, stretching to type L. 

 Fig. 2g.— Bacterium bulgaricum (No. 49). Whey-yeast agar, 6 days old at 

 40° C. Types C, D, E, F, G, I, and K. Fig. 30. — Bacterium fluorescens 

 (No. 40). Ammonium-citrate-glycerin solution, 11 days old. Types D 

 and H 702 



Plate F. Fig. ^i.—Sarcinaflava (No. 43)- Beef agar, i day old. Type I in 

 conjimction and forming D. Fig. ^2.— Streptococcus lactis (No. 48). Pep- 

 tone lactose solution, 5 days old. Type D, with regenerative tmits, forming 

 type I. Fig. ^^.—Streptococcus lactis (No. 48). Milk, 3 days old. Types 

 D and I in casein. Fig. 34. — Bacillus radicicola(No. ^g). Types D and I. 

 Preparate made from a root nodule in 1908. Fig. 35. — Spirillum sp. from 

 Great Salt Lake (No. 46). Beef broth plus 3 per cent of sodium chlorid, 14 

 days old. Budding and branching forms; stained and tmstained regenera- 

 tive bodies. Some cells in conjunction. Fig. 36. — Spirillum sp. from 

 Great Salt Lake (No. 46). Beef broth plus 3 per cent of sodium chlorid, 

 14 days old. Type I germinating 702 



Plate G. Fig. 37. — Micrococcus candicans from soil (No. 45). Ammonium- 

 citrate-glycerin solution, 6 days old. Irregular, thick-walled type I. 

 Fig. 38. — Micrococcus candicans from milk (No. 44). Ammonium-citrate- 

 glycerin solution, 2 days old. Irregular, thick-walled type I. Fig. 39. — 

 Yellow bacillus (No. 41). Beef agar, i day old. Budding gonidia, forma- 

 tion and germination of type I. Fig. 40. — Bacteriiim fluorescens (No. 40). 

 Ammonium-citrate-glycerin solution, 2 days old. Budding gonidia, for- 

 mation and germination of type I. Fig. 41 .—Bacterium fluorescens (No. 40), 

 Beef agar, 4 days old. Filterable gonidia germinating. Fig. 42. — Bac- 

 terium fluorescens (No. 40). Beef agar, 4 days old. Types D and F formed 

 bj"^ filterable gonidia. Dark field 702 



A Respiration Caloiumeter, Partly Automatic, for the Study op Meta- 

 bolic Activity of Small Magnitude 



Plate XCII. — General view of the respiration calorimeter: A, Chamber 

 inclosed in heat-insulating cover. B, Tension equalizer to maintain atmos- 

 pheric presstire in the air of the chamber. C, Absorber table. D, Rotary 

 pump to maintain air circulation. E, Motor to drive pump. F, Bottles 

 containing sulphuric acid to remove water vapor from circulating air. G, 

 Large U-tube, containing soda-lime to remove carbon dioxid from the air. 

 H, Bottle containing sulphuric acid to catch the water vapor from the soda- 

 lime. /, Bottle containing cotton to catch sulphuric acid vapor. /, Small 

 absorbers for determining water vapor and carbon dioxid in residual air. K, 

 Meter to measure the sample of residual air. L, Reservoir to maintain a 

 constant pressure of water in the heat absorber in the chamber. M, Tank 

 to catch water flowing from the heat absorber. A^, Pump to raise water 

 from the tank to the reservoir. O, Devices for automatically controlling 

 and recording temperatures 720 



