407 



Microscopic Appearance of Penicillium — Continued. 





Size of 





Preservative. 



Germinated 



Characteristics of Development. 





Conidia in /J. 





Cinnamon, 10% 



15.2 



Hyphse swollen, blunt tips, protoplasm finely granulir, without 







cohesion, walls break with weight of cover-glass. Few sepia 







in some, in others prominent. Few side branches. Hyphse dis- 







organized when placed in water. 



Cloves, 10% 



13.3 



Hyphse swollen, blunt tips thicker than older part, short thick side 







branches, finely granular protoplasm, not so badly disorganized 







as in cinnamon. 



Cranberry, raw 



7.6 



Hyphse shrunken, distorted, tendency to develop conidiophores close 

 to germinated conidia. 



Cranberry, cooked, open 



6.7 



Hyphse thin, tapering, protoplasm finely granular. 



Cranberry, cooked, covered . . 



7.6 



Hyphse slender, tapering to threads, protoplasm reduced to lining 

 of walls, coarse granules, many septa. 



Alcohol, 5% 



15.2 



Hyphse swollen, distorted, walls tough, protoplasm clear. 



Hyphse enlarged, blunt tips, few septa, short side branches, proto 

 plasm finely granular. 



Acetic acid, 1-5% 



11.4 







Sodium benz., 1-5% 



15.2 



Hyphse and conidia swollen and distorted, no uniformity in forma- 





38.0 



tion of septa, some hyphse, few, others many; protoplasm coarse- 

 ly granular, filling tubes; walls break readily. 



Benzoic acid, 1-10% 



15.2 



Hyphse larger than in benzoate, more easily broken, distorted. 





49.4 



Less swollen hyphse have less distortion and less disorganiza- 

 tion. 



Borax, 1-5% 



9.5 



Hyphse short, distorted or long and swollen, blunt ends, proto- 

 plasm clear, homogeneous or finely granular. 





15.2 



Boric acid, 1-5% 



15.2 



Hyphse swollen, short thick side branches, blunt ends, protoplasm 





19.0 



finely or coarsely granular. 



Sodium salicylate, 1-5% 



9.5 



Hyphse as wide as germinated conidia, few septa, granular proto- 





15.2 



plasm. 



Salicylic acid, 1-5% 



15.2 



Hyphse and conidia swollen, some of the conidia much elongated, 

 hyphal ends blunt, few septa, protoplasm yellow, coarsely gran- 





30.4 







ular, protoplasm and walls disorganized. 



Sodium sulphite, 1-5% 



11.4 



Hyphse enlarged, few septa, protoplasm coarsely granular. 



Saccharin, 1-5% 



13.3 



Hyphae enlarged, some much swollen, slight distortion, clear, homo- 

 geneous protoplasm, thick, stunted conidiophores. 







Copper sulphate, 1-5% 



11.4 



Hyphae enlarged, slight distortion, protoplasm yellow, finely gran- 

 ular, dirty appearance. 



