494 
Journal of Agricultural Research 
Vol. XXIV, No. 6 
TabIvIJ XVIII. —Results of physical tests on samples ^ 2^ years in peat taken from drains 
at Coon Creek Aug. i, ig2i {yinch tile tested) 
Physical tests. 
Sample. 
lA. 
Sample. 
iB. 
Sample. 
iC. 
Sample. 
2A. 
Sample. 
2B. 
Weight after 3 months drying (pounds). 
9. 70 
9. 02 
9. 19 
9 - 27 
9 - S 3 
Breaking load (pounds). 
Absorption,bone dry and boiling method; 
826 
804 
1007 
810 
1016 
Top piece in mold. 
12. 9 
IS- 6 
13 - 7 
13- 8 
13- d 
Center piece in mold. 
14.3 
17.9 
IS- I 
16. 2 
IS -4 
Bottom piece in mold. 
14. I 
13 -I 
13-3 
17-4 
IS-8 
Average. 
13.8 
IS- s 
14. 0 
IS-8 
14- 9 
1 A considerable number of tile had been left over when ths job was finished, and had been stock piled on 
high ground at the edge of the marsh. Of these, 10 were taken as a sample, 5 being given to the soils depart¬ 
ment and 5 tested on October 25 in the drainage laboratory. 
TabIvE XIX. —Results of physical tests on concrete tile from stock pile at Coon Creek 
{yinch tile tested, age j years) 
Physical tests. 
Sample 
1-6. 
Sample 
1-7. 
Sample 
1-8. 
Sample 
1-9. 
Sample 
I-10. 
Weight after 3 months drying (pounds.) 
10. 27 
9 - 30 
10. 25 
9. 61 
10. 00 
Breaking load (pounds). 
Absorption: 
1152 
983 
1196 
830 
1265 
Top piece in mold. 
12. 2 
13-3 
II. 8 
IS -1 
13-4 
Center piece in mold. 
12. 2 
IS. 6 
13 - I 
14.1 
16. 3 
Bottom piece in mold. 
13- 2 
14. 2 
13- 0 
14 - S 
14-3 
Average. 
12; S 
14. 4 
12. 6 
14. 6 
14. 7 
A comparison of the figures in these tests discloses some interesting 
facts that are tabulated in Table XX. 
Tabb^ XX. —Comparison of physical tests on Coon Creek tile at different ages and under 
different conditions 
Physical tests. 
I week 
after 
delivery. 
3 weeks 
after 
delivery. 
3 years old 
in stock 
pile. 
2f years 
old in 
peat. 
Weight, air dry average. 
8. 56 
9.89 
9 - 34 
Wet weight. 
10. 025 
Breaking load, dry . 
910 
Breaking load, wet.. 
S 74 
17. I 
1085 
893 
Absorption, cold, per cent (estimated). 
Absorption, boiling. 
13.8 
13. 2 
14-3 
13.8 
14. 8 
13- 9 
IS-8 
14- 7 
Absorption, top piece in mold. 
Absorption, center piece in mold. 
Absorption, bottom piece in mold. 
