
377 
found, and the same quantity, two grams, were taken in 
all my trials except column I, where three grams were 
taken and treated as in A. 
The fat had not been extracted from the material used in 
these trials for comparison, but to determine what influ- 
ence this may. have, the fat was extracted from one set 
before determining the fiber, and the results form column 
J. In other respects the same as A. 
The determinations for column K were by method B, 
except that B was filtered through an asbestos filter and K 
through filter paper. 
Column L is column K minus the ash. 
In determining the the fiber of hay by méthod A, I made 
two sets at different times, and the last set gave lower re- 
sults than was obtained the first time. I think the differ- 
ence isdue mainly to the heat being greater in the last 
case. The pressure and quality of the gas in this laboratory 
is quite variable. The gas is generated from gasoline and 
the pressure and quality gradually varies with the time 
from adding a fresh supply. The first set in A table IT 
‘were made while the pressure was low, and the second set 
was made two days after putting in gasoline and with a 
high pressure. . While the probable error for the six dupli- 
‘cates in each set is very nearly the same—0. 15 and uv 17 
—the difference between the two sets is 0 68 being less 
for the last at time of greatest heat. 
In each set of determinations I have given the figures in 
full so that any one who may desire to, can compare 
throughout the results. The probable error has also been 
given, although the number of duplicate determinations 
-are too few to afford much value in this direction. 
' TABLE I. ~ 
‘Wheat Bran. 
‘A B I D F H G 
(14.43 14.76 15.02 14.62 17.81 26.20 24:41 

14.70 18.60 14.70 15.80 15.70 ..... 25.04 
14.72 13.68 14.38 14:61 16.09 ..... 24.09 
1298 13.70 14h oT Te40 dai go 
14.29 13.99°°.:,2. 18.79 18.24 “4. 0.,° 27.44 
SDE BI AB Bboy tth 19! 15190 ee SLOAN Lah Kp! 
Average... 9 14.40.1882. 14.70.44.78 16.84 26.20. 24.58 
Probable error gos ep 19 ain 89.i. 922. 28 POD ho kt OB 
