THIEiiAVIOPSIS PARADOXA. 



553 



Acetic Acid. 



Tannic Acid. 

 As a preliminary experiment, spores were sown in sugar 

 cane solution to which 1 per cent, tannic acid had been added. 

 There was no trace of tannic acid in the original solution. 

 The control culture showed good growth in two days, but there 

 was no growth after ten days in the tannic acid culture. 

 The spores from this culture were transferred to sugar cane 

 extract, and produced a good growth of macroconidia within 

 five days. Temperature, 71-78"^ F. Further cultures were 

 then made, as follows : — 



