448 
Journal of Agricultural Research voi. xxix, No.« 
Table VI .—Calculated mineral composition of American and European dustfalls 
Percentages 
Constituents 
Quartz_ 
Albite_ 
Orthoclase. 
Anorthite.. 
Kaolinite.. 
Chlorite_ 
Enstatite-- 
Calcite_ 
Apatite_ 
Anhydrite 
Hematite... 
Ilmenite_ 
Water, etc. 
Total. 
I 
A° 
52. 27 
9. 91 
12.50 
8 . 01 
.43 
2. 77 
B 
36. 47 
17. 89 
13.69 
7.64 
7.94 
9.26 
C 
18. 36 
14. 21 
15. 32 
4. 73 
26.20 
4.20 
D 
13. 34 
9. 82 
13.64 
4. 38 
28. 85 
5.13 
13.86 
.39 
.35 
3.70 
.93 
8.51 
6. 54 
6. 57 
1.01 
7.03 
10. 42 
4.41 
99.42 
101. 28 
99.98 
100.00 
E 
F 
5. 75 
22.14 
12.28 
4. 44 
25. 22 
8. 66 
17. 32 
14.04 
9. 38 
16.17 
G 
21. 98 
16. 15 
7. 75 
13. 01 
6.11 
7. 85 
.46 
2. 33 
7. 03 
4.41 
100.57 
2.30 
19.17 
8. 36 
9.19 
11. 43 
6.40 
20 . 89 < 
100. 65- 
00 
a A—Dustfall at Madison, Wis., Feb. 13, 1923. 
B—Dustfall at Madison, Wis., Mar. 19, 1920. 
C—Dustfall at Otakaia, New Zealand, Nov. 14, 1902. 
D—Dust in “red rain” at Lamberhurst, England, Feb. 22, 1903. 
E—Dustfall at Naples, Italy, Mar. 1, 1901. 
F—Dustfall at Naples, Italy, Feb. 25,1879. 
G—Dustfall at Taormina, Sicily, Mar. 10, 1901. 
Table VII .—Calculated mineral composition of Madison dustfalls compared with 
that of the Mississippi Valley loess 
Percentages 
Constituents 
A a 
B 
C 
D 
E 
F 
G 
H 
Quartz__ 
58.58 
52.27 
49.50 
48. 89 
45.56 
43. 52 
39.66 
36. 47 
Albite.. 
9.14 
9. 91 
12.10 
14. 30 
14. 22 
9.24 
11. 42 
17.89 
Orthoclase_ 
12.16 
12.50 
10.86 
6.98 
12.62 
12.03 
12.20 
13. 89 
Anorthite 
3. 34 
8.01 
4. 74 
2.19 
7.60 
7.64 
Kaolinite_ 
11. 55 
.43 
14.12 
12.29 
14. 83 
17.15 
15.62 
7.94 
Chlorite 
. 71 
2. 77 
3.10 
1. 55 
3. 65 
9. 26 
Enstatite . 
3.17 
1. 37 
3. 24 
Calcite. 
1.11 
6. 43 
.88 
9. 39 
Magnesite 
3.56 
4. 57 
Apatite 
. 39 
.21 
.94 
. 53 
. 14 
.35 
Gypsum 
1.10 
.22 
Ilmenite 
1. 33 
.93 
.26 
1.12 
1. 37 
.76 
1.01 
Hematite 
2. 76 
3. 70 
3. 25 
2.97 
2.71 
4. 02 
2.17 
Magnetite 
1.19 
.64 
Water, etc 
. 85 
8. 51 
. 58 
. 10 
3.12 
7.03 
Total__ 
100. 42 
99. 42 
99. 83 
100.65 
100.22 
100. 33 
100.03 
101. 28- 
° A—Loess, Terre Haute, Ind. ( 8 , p. 562). 
B—Dustfall at Madison, Wis., Feb. 13, 1923. 
C—Loess, Kansas City, Mo. {1, p. 282). 
D—Loess, Mt. Vernon, Iowa (4, p. 189). 
E—Loess, Dubuque, Iowa (/, p. 282). 
F—Loess, Kansas City, Mo. (5, p. 94 ). 
G—Loess, Galena, Ill. (1, p. 282). 
H—Dustfall at Madison, Wis., March 19, 1920 {12 p. 349). 
