[Vor. 3 
478 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
favorable moisture and temperature conditions for one year. 
After this period they were dried, and the percentage of re- 
duction in weight due to fungous decay was determined. Con- 
trol blocks of the same specific weight and from the same 
samples were kept in a sound condition. 
To make the cellulose determinations the blocks from the 
cultures and the controls were planed into fine shavings. All 
of the shavings from each sample were placed in a 250-сс. 
TABLE XI 
"n DETERMINATIONS OF CELLULOSE FROM BLOCKS OF PINE WOOD, 
OTH SOUND, AND DECAYED BY LENZITES SAEPIARIA 
g: ча ч 9 әс» So 2 o e 
25 8 es Bs*:|zsE ОП 28 | 8.8 Se? 
FE; 3 $3 | bes | Boo] зе] BS | 252) 25 
He} 8 ne) og 355 RES 28 Ié glans 
gm. gm. gm. 
OS | Decayed | .424 | 13.373 | 6.973 | 47.86 | 0.9563 | 13.714 | 43.057 
05 Sound See FE ek Lu asl 2.0592 | 24.0848 Kee 
F5 Decayed | .419 | 12.580 | 8.494 | 32.48 | 1.2952 | 15.248 | 38.187 
F5 Sound .419 Ito We a ere IAN D 2.3066 | 24.668 |........ 
A 24 Decayed | .547 | 12.418 | 5.84 52.97 | 0.1943 | 3.327 | 75.654 
A 24 Sound .547 LUE E ceu 0.9703 | 13.666 |........ 
Erlenmeyer flask containing about 125 ee. of the solution of 
potassium chlorate in nitrie acid mentioned above. These 
were placed in an ice chest for 3 weeks, after which time the 
contents of each flask was diluted to about 3 liters. The di- 
luted liquid was thus weak enough not to attack a filter paper 
while filtering. The liquid was filtered off through a Buchner 
funnel containing a tared filter paper. The cellulose thus ob- 
tained was repeatedly washed with hot distilled water until 
it was of a pure white color and gave a deep blue reaction with 
zinc chloriodid. In all cases the yield of cellulose was so clear 
of foreign material that it was deemed unnecessary to precipi- 
tate from Sehweitzer's reagent. After drying and weighing, 
the percentage loss in cellulose due to the action of the fungus 
was determined. The different factors in this experiment are 
tabulated in table хі. 
In these 3 determinations there seems to be no definite re- 
lation between the percentage loss of cellulose and the percent- 
