187 
cations were formed in from ten to fifteen days. 
‘exception the control plants remained perfectly healthy. Inocu- 
lations of unwounded surfaces were a total failure. Nothing 
resembling the polymorphism described ‘by Farneti nor the 
5 
imorphism obtained by Brooks was noted at this, or any 
other stage, of the investigation. Th croconidia appea 
be ely a normal developmental stage in the life cycle of 
Conpitions or Microconrprat Formation. 
In 1896, Klebs* demonstrated that the developmental stages in 
the life-history of the algae and fungi are determined by specific 
quantitative changes in the conditions of life of the organisms. 
seemed desirable therefore in the present case to ascertain if 
not the temperature, was the primary factor involved. These 
authors found the sterility to become permanent, but this has not - 
* Klebs, G.: Die Bedingung der Fortpflanzung bei Algen und. Pilzen. 
Jena, 1896 ; also Jahr. f. wiss. Bot. 1898 and 1900; Probleme der Entwicke- 
lung iii. Biol. Centralb. 1904. t 
