162 



THE ILLINOIS GLACIAL LOBE. 

 Table III. — Upland loess, pervious to water. 



1-.5.... 

 .5-. 25.. 



.1-.05.... 

 .05-. 01... 



.01-. 005.. 

 .005-. 0001 



Fine gravel ... 

 Coarse sand... 

 Medium sand . 



Fine sand 



Very fine sand 



Silt 



Fine silt 



Clay 



Total mineral matter . . . 

 Organic matter, water, loss... 



Loss by direct ignition . 



Grains 

 per gram. 



0.00 

 0.00 

 0.02 

 0.10 

 6.55 

 49.20 

 11.21 

 23.94 



91.02 



100. 00 

 9.52 



148 



122, 900 



14, 440, 000 



210,400,000 



11,440,000,000 



0.00 

 0.00 

 0.01 

 0.04 

 9.93 



11,664,963,051 



100. 00 

 6.14 



Grains 

 per gram. 



180, 500 



13, 890, 000 



153, 000, 000 



10, 970, 000, 000 



11, 137, 070, 558 



(1308) Carrollton subsoil, 

 ' 24-44 inches. 



0.00 

 0.10 

 0.87 

 1.00 

 6.17 



62.58 

 8.76 



12.52 



100. 00 

 4.16 



Grains 

 per gram. 



129 



1,462 



114, 600 



18, 170, 000 



162, 700, 000 



5,916,000,000 



6. 096, 986, 193 



Table IV. — Upland loess, almost impervious to water. 1 



Diameter 



in mil- 

 limeters. 



Conventional names. 



Grains per 

 gram. 



(1342) Northern Cum- 

 berland County soil, 

 1-12 inches. 



Grains per 

 gram. 



(1345) Western Jeffer- 

 son County soil, 

 2-15 inches. 



Per Grains per 

 cent. gram. 



Grains per 

 gram. 



2-1 



1-.5 



.5-25 



.25-1 



.1-05 



.05-01 



.01-005.... 

 .005-. 0001.. 



Fine gravel — 



Coarse sand 



Medium sand .. 



Fine sand 



Yery fine sand 



Silt 



Fine silt 



Clay 



Total mineral matter . . 

 Organic matter, water, loss.. 



Loss by direct ignition 



1.92 

 1.22 



0.58 



35 



178 



65, 130 



92, 790 



16, 870, 000 



202, 100, 000 



, 564, 000, 000 



0.30 

 1.05 

 3.42 

 3.30 

 0.47 

 55.48 

 11.70 

 14.90 



93.54 

 6.46 



6, 783, 128, 134 



100. 00 

 5.59 



!>c. i;- 



100.00 

 3.11 



483 

 4,595 

 114, 400 

 , 340, 000 

 , 900, 000 

 , 000, 000 



6, 929, 359, 497 



0.00 

 0.07 

 0.29 

 0.40 

 6.38 

 56.92 

 12.18 

 17.1 



116, 900 

 16, 290, 000 



7, 948, 000, 000 



0.00 

 0.08 

 0.77 

 0.11 

 4.88 

 52.50 

 12.15 

 22.10 



15,020,000 



221.600,000 



10, 300, 000, 000 



93.30 

 6.70 



100. oo 

 4.49 



93.39 

 6.61 



100. 00 

 5.73 



10,536,722,504 



1 Professor TJdden states that the coarse particles found in these samples are usually concretions 

 instead of sand grains or x>ebbles. It is probable that the sand seldom exceeds the diameter .25—1, or the gl 

 Band. 



of iron oxide, 

 ade called fine 



