530 
Chaudhuri.—A Study of the Growth in 
we find that the growth at the optimum temperature 22-5° C. is always the 
best, only it is not so marked during the first twenty-four hours, when 
almost equal amount of growth has taken place at 20° C. But when the 
spore germination curve is studied in Fig. 3 we find that the difference 
between 20° C. and 22-5° C. is quite significant even for the first twenty-four 
hours. 
The following are the average figures for different temperatures of the 
Fig. 7 * The continuous lines represent the daily growth in diameter of mycelium on Coon’s 
medium (plus agar) at the temperatures indicated. The thick dotted line represents the dry 
weight of mycelium produced in ten days at the different temperatures. The two vertical scales 
represent on the left mm., on the right mgm. 
diameters of the mycelia taken daily. Fig. 8 shows a photograph of the 
colonies grown at different temperatures. It will be seen that no growth has 
taken place at 27 0 C. nor at io° C. 
The following data show the dry weight at different temperatures after 
a period of ten days; the average is that of three samples : 
12°C. I 4 °C. i6°C. 18°C. 20° C. 22.5 0 C. 2 5 °C. 
0.0087 grm. 0.0161 grm. 0.0181 grm. 0.0224 grm. 0.0225 grm. 0.0253 grm. 0.0144 grm. 
