EXPERIMENTAL CONDITIONS 55 



the very numerous photographs taken has, of 

 course, been reproduced. 



Details concerning each illustration will be found 

 in the explanation of the Plates, but it will be 

 useful here to call attention to some particulars. 



It may be seen that the TorulaB vary very much, 

 not only in size, but in character. Thus, in some 

 they are minute and separate, as in Plate 3, Fig. 

 14, and Plate 4, Fig. 20 B; while in others they 

 are quite large, and form continuous groups, as 

 in Plate 3, Fig. 17. Frequently they look homo- 

 geneous and glistening, as in Fig. 1 ; while at other 

 times they have distinctly granular contents and 

 thick walls, and show, perhaps, vacuoles or else 

 commencing hyphge (Plate 1, Fig. 5). 



The Bacteria, too, have been of different kinds, 

 Bacilli and Micrococci being the most common, 

 sometimes occurring separately and sometimes in 

 association, and then either alone or mixed with 

 Torulse or with Moulds (see Plates 1-3, Figs. 3, 

 4, 8, 9, 11, 16). 



The Moulds met with have varied a good deal 

 in kind. In some there has been only a mere com- 

 mencing or incipient mycelium, as in Plate 2, Figs. 

 9, 10, 11; in others they have been more devel- 

 oped, and often mixed with conidia, as in Plate 



