The rates given in tables III - VI do not always repre- 

 sent single series. In many cases the same maintained tempera* 

 ture was tested at different times for the same funrus and all 

 the measurements that were available for any fungus and tem- 

 perature have teen used in deriving the mean rate for that fun- 

 gus and temperature, without reference to the particular series 

 of tests in which any group of measurements may have occurrto. 

 Also, the data in any vertical column of these tahles, repre- 

 senting the enlargement rates for the respective maintained 

 temperatures indicated in the first column, do net all repre- 

 sent the same 3trics. 



Experime n tal ser ies : General experimental series 

 were carried cut for each fungus, and the seven temperatures 

 employed were not the same in all cases, the battery of cham- 

 bers being so adjusted for each series as tc give the main- 

 tained temperatures that promised to be most useful. With- 

 out any reference to experimental series, all the available 

 data have b3cn brcught together in these tables' This pro- 

 cedure, by which the separate series are not kept distinct, is 

 allowable in such wort: as this, where all conditions were 



practically controlled. In sc far as the inoculating ma- 

 terial for all cultures of any fungus was always the same, a.-id 

 in sc far as the nutrient medium was likewise always the same, 

 it make*> no difference at what time of year any given test, was 

 made. The radiation and temperature conditions of the gener- 

 al surroundings, outside of the chambers, were sensibly with- 

 out influence on these conditions within the chambers. Thus 

 a test for a given maintained temperature may have been made 



47 



