0/ 



forming within the spore wall and occupying only a portion 

 of its volurr.e. These appear to have essentially the charac- 

 teeistics of chlamydospores formed within the organism. All 

 other renewed activities of the spores which have been de- 

 scribed belong to the second category (b), and embrace 

 those growth processes which result in more or less restric- 

 ted swellings, especially at the ends of the spores, in ap« 

 pressorla, with either dark or hyaline wall, and in short 

 germ tubes somewhat resembling the normal but of much great- 

 er diameter. (3) Ko renewed activity may occur at all dur- 

 ing a period of from 18 to 2C hours under the given treat- 

 ment, although capacity to germinate if transferred from 

 this treatment to another (as to distilled watyr) may still 

 be rstained. Here the treatment prevents germinal activity 

 but does not destroy viability, at least within the given 

 time limits. (4) Tiability, or power to germinate in water, 

 may be destroyed within a period of from 18 to 24 hours; 

 the organism is killed outright. 



It has already become clear in this work that most 

 of the substances dealt with produce death within the assumed 

 time limits, if applied at a sufficiently high concentrat- 

 ion (4). 7ith a somewhat lower concentration of the injur- 

 ious material germination is inhibited but viability is re- 

 tained throughout the given period (3). '.Vhen the concentra- 

 tion is still lower germinal activity becomes manifest but 

 takes other forms than those recognized as normal (2). 



