424 
Journal of Agricultural Research 
Vol. XXVIII, No. 5 
residue was used for the determination of polysaccharides. Total polysac¬ 
charides were determined by inversion with hydrochloric acid, estimation of 
sugars and calculation as starch. To determine the polysaccharides soluble in 
cold water 1 gram of the alcohol-insoluble residue was ground in a mortar with 
40 to 60 c. c. of distilled water, allowed to stand for several minutes, the milky 
supernatant portion decanted, and the process repeated several times. Finally 
the whole was washed into a 250 c. c. volumetric flask and brought to volume 
with distilled water. The sample thus prepared was allowed to stand over 
night. The milky supernatant portion was then decanted, mixed with a small 
amount of dry infusorial earth and then filtered by means of suction through a 
dry asbestos mat filler into a dry flask. Aliquot portions of this were transferred 
to boiling flasks, inverted with hydrochloric acid and the sugars determined in 
the usual way. The cold-water-soluble polysaccharides were calculated as 
dextrin. Table III shows the results of the analytical work. 
Table III.— Showing results of chemical analyses of 17 varieties of corn sampled at 
intervals of 5 days throughout the whole growth period 
Variety and age in days from time 
of silking 
Mois¬ 
ture 
Dry 
matter 
Total 
sugar 
calcu¬ 
lated as 
invert 
Reducing 
sugar 
calcu¬ 
lated as 
invert 
Nonre¬ 
ducing 
sugar 
calcu¬ 
lated as 
invert 
Water 
soluble 
polysac¬ 
charides 
calcu¬ 
lated as 
dextrin 
Total 
polysac¬ 
charides 
calcu¬ 
lated as 
starch 
Golden Bantam: 
5 . .. 
89.45 
10. 55 
4. 01 
3.36 
0.65 
0.30 
1.43 
10 _ ...... 
88 . 62 
11.38 
4.75 
3.11 
1.64 
.28 
1.79 
15 _ . 
79.14 
20.86 
5.89 
1.92 
3.97 
3.21 
8.44 
20 ....-. 
69.67 
30.33 
4.30 
.89 
3.41 
8.90 
17.46 
25_ .... 
62.98 
37.02 
2.82 
.52 
2.30 
12.13 
23.02 
30.... 
58.37 
41.63 
2.14 
.67 
1.47 
13.97 
27. 73 
Howling Mob: 
5 ... 
89.40 
10.60 
112 
3.43 
.69 
.22 
1 . 21 
10 ...... 
88.05 
11.95 
4.80 
3.35 
1.45 
.18 
1.80 
15.... 
82.29 
17.71 
5.67 
1.90 
3.77 
2.50 
6.47 
20 ___ 
71.50 
28.50 
4.55 
.93 
3. 62 
8.96 
16.42 
25 _ ..... 
64.80 
35.20 
3.56 
.67 
2.89 
11.81 
21.25 
30 _ .__.— 
62, 95 
90.23 
37.05 
2.06 
.61 
1. 45 
12.67 
23.88 
Dreer’s Golden Giant: 
5_...... 
9.77 
3.91 
3.11 
.80 
.21 
1.36 
10 ... 
87.73 
12.27 
4. 50 
3.00 
1. 50 
. 16 
1. 78 
15.__ 
79.93 
20.07 
4. 81 
1.57 
3.24 
2.54 
8.63 
20 -... 
70.04 
29. 96 
3.88 
.84 
3.04 
8.56 
17.43 
25 .... 
65.77 
34.23 
3.12 
.61 
2.51 
10. 56 
20.47 
30_ ... 
61. 73 
38.27 
2.00 
.63 
1. 37 
13. 21 
26.84 
Charlevoix: 
5 .... 
90.62 
9.38 
4. 05 
3.34 
.71 
.20 
1.32 
10 _ ... 
88.02 
11 . 98 
161 
3. 25 
1. 36 
.15 
1.64 
15 ...... 
82.80 
17. 20 
5. 71 
1.96 
3. 75 
1. 75 
5. 74 
20 _ .... 
75.20 
24. 80 
116 
.76 
3. 40 
7.09 
13.41 
25 .... 
69. 03 
30.97 
3.24 
.69 
2. 55 
10.31 
18.51 
30_ .... 
65. 84 
3116 
2. 65 
.58 
2.07 
11.23 
21. 51 
Crosby: 
5..... 
•90.13 
9. 87 
4.12 
3. 48 
.64 
. 11 
1. 30 
10 .... 
88.91 
11.09 
4.98 
3. 35 
1.63 
. 14 
1.73 
15- ..1-.. 
80.61 
19. 39 
6.05 
l. 93 
4.12 
2.75 
7. 30 
20 _ . ..-. 
70.00 
30.00 
125 
.95 
3.30 
8 . 86 
17.26 
25.. .. 
65. 20 
34.80 
3.20 
.70 
2.50 
11.14 
20.88 
30_.... 
59.29 
40.71 
2 . 20 
.53 
1. 67 
14. 58 
32.48 
Morse’s Golden Cream: 
5 ....... 
90.19 
9. 81 
3.73 
3.15 
.58 
.16 
1. 41 
10 ... 
87. 79 
12.21 
173 
2.57 
2.16 
. 17 
1.83 
15__- 
79. 75 
20.25 
5. 43 
.1.79 
3. 64 
3. 26 
8.44 
20 ___ 
71.99 
28. 01 
1 01 
1.04 
2. 97 
8.44 
15. 67 
25 . . ... 
64. 45 
35.55 
3.29 
.72 
2. 57 
11. 48 
21. 50 
30 ___ 
58. 52 
41. 48 
2.68 
.64 
2.04 
14. 76 
29. 06 
Kelly’s Hybrid: 
5..... 
90.00 
10.00 
4. 08 
3. 48 
.60 
.21 
1.39 
10 - ___ 
88.09 
11.91 
4. 85 
2. 90 
1.95 
. 17 
1.92 
15 ....- 
79. 73 
20.27 
5. 65 
1.38 
4.27 
3. 61 
7. 77 
20 ______ 
70.65 
39. 35 
4. 60 
.90 
3. 70 
9. 05 
16. 65 
25 __ 
67. 46 
32. 54 
3. 45 
.71 
2.74 
10. 51 
19.28 
30. -.. 
62. 57 
37. 43 
2 . 80 
.52 
2.28 
13.19 
25.55 
