EXPLANATION OF PLATES 65 



Fig. 21. Portion of a large mass of Mould, with heads of aero- 

 spores (Penicillium) , from tube No. 98. 



" 22. A Penicillium cultivated from tube No. 62. 



" 23. Great development of Torulae, from tube No. 113, 

 found beneath cover-glass on fourth day after 

 mounting. 



* 84. Cultivation of Bacilli from tube No. 35. 



PLATE 5. 



Organisms from tubes that had been heated to 135 C. for 5 H 

 (Figs. 25, 28 from Yellow Solutions; Figs. 26, 27 from 



Colourless Solutions). 



Also Fig. 29, Organisms from an airless retort that had been 



heated to 100 C. for 20". 



Fig. 27X500; each of the others X 700. 



Fig. 25. Portion of a delicate mycelium, with many spore-like 

 bodies on the hyphse, from tube No. 39. 



" 26. Large budding Torulae, some showing granules, and 

 one a very distinct vacuole all from tube No. 42, 

 which, during the last five weeks, had been ex- 

 posed to sunlight at a south window. 



" 27. Multiplication of Torulaa, from tube No. 34, on under 

 surface of cover-glass, as seen on fifth day after 

 mounting. 



" 28. Swarms of Torulae and Micrococci cultivated from 

 tube No. 45. 



" 29. Organisms from an airless retort (No. 75) sealed 

 during ebullition after 3", and then heated in a 

 can of boiling water for 17". 



a. Bacilli; b. and c. Torulae showing vacuoles; d. 

 Leptothrix-like filaments. 



