Feb. II. 1918 Freezing-Point Method and Soil Solution 



379 



Table III. — Observed and calculated freezing-point depressions 



Date. 



Moisture. 



Soil 

 lA. 



Soil 

 iB. 



Observed 



freezing-point 



depression. 



Soil 

 lA. 



Soil 

 iB. 



Osmotic 

 pressure (atmos- 

 pheres). 



Soil 

 lA. 



Soil 

 iB. 



Calculated total 



solids in soil 



solution . 



Soil lA. 



Soil iB. 



Freezing-point 

 depression cal- 

 culated to uni- 

 form moisture.a 



Soil 

 lA. 



Soil 

 iB. 



July 10, 

 July 24, 

 Aug. 21 

 Oct. 23. 

 Dec. 18 

 Feb. 12 

 May I . 



July 10. 

 July 24. 

 Aug. 21 

 Oct. 23 

 Dec. 18 

 Feb. 12 

 May I . 



July 10. 

 July 24, 

 Aug. 21 

 Oct. 23 

 Dec. 18 

 Feb. 12 

 May I . 



July 17, 



July 31- 



Aug. 28 

 Oct. 30 . 

 Dec. 26 

 Feb. 19 



May 7 . 



P. ct. 

 23.2 

 22. 5 



23-9 

 21.8 



23-4 

 22. 7 

 21. 9 



Soil 

 2A. 



20. 4 

 19.7 



23-7 

 18.3 

 20. 4 

 20. 2 

 17.4 



Soil 

 3A. 



18.6 



19. o 



22. O 



20. 5 

 20. 9 



20. 6 

 19. I 



Soil 



4A. 



18.8 

 18.6 

 19. 2 

 17-3 

 19-3 

 17. 6 



16.5 



P. ct. 

 22. 4 

 22. 7 

 23.0 

 21. I 

 22.3 

 21. 7 

 20.3 



°C. 



0.030 



. 029 



. 019 



• 050 

 •037 



• 056 

 .082 



" c. 

 o. 064 

 .065 

 . 062 

 .118 



•095 

 . 108 



.138 



Soil 

 2B. 



Soil 

 2A. 



Soil 

 2B. 



Soil 



2A. 



21. 4 

 20.8 

 21. 3 

 18.9 

 20. o 

 20. 2 

 17-3 



o. 026 



034 

 008 



055 

 047 

 056 

 131 



o. 044 



.047 

 .049 

 . 092 



.087 



. lOI 



. 201 



0.32 

 .41 



. 10 

 .66 

 .56 

 .68 



1.47 



Soil 

 3B. 



Soil 

 3A. 



Soil 

 3B. 



Soil 

 3A. 



22. 2 

 22. 2 

 22. 7 

 20. 9 

 20. 7 

 19.9 



17-5 



o. 130 



.078 

 . 017 



•075 

 .048 

 . 062 

 .068 



0-055 

 .036 



.034 

 . no 

 . 060 

 . 120 



• ^2,S 



I. 46 



•94 

 . 20 

 .90 



•58 

 •74 

 .82 



Soil 

 4B. 



Soil 



4A. 



Soil 

 4B. 



Soil 

 4A. 



18.5 



19. 6 



20. o 

 16. 7 

 18.0 

 17.2 

 I5^8 



o. 048 

 .050 

 . 017 

 .068 



•055 

 .098 

 . 106 



0.047 

 .066 



•057 

 .082 



157 



0.58 

 .60 

 . 20 

 .82 

 .66 

 I. 19 

 I. 29 



0.77 

 •78 

 •74 

 1^43 

 I- IS 

 I- 31 

 1.56 



P. p.m. 



900 



900 



600 



I, 600 



1, 200 

 1,800 



2, 600 



P. p.m. 

 2,000 

 2,000 

 I, 900 



3,700 

 3,000 

 3,400 

 4,300 



' C. 

 039 



033 

 028 



047 

 050 

 066 

 080 



Soil 

 zB. 



Soil 2A. 



0.53 

 •56 



•59 

 I. II 

 1.05 



1. 22 



2. 42 



800 

 1, 100 



300 

 1,700 

 1,500 

 I, 800 

 4, 100 



Soil 2B. 



Soil 

 2A. 



Soil 

 3B. 



Soil 3 A . 



66 



44 

 41 



72 



45 

 52 



4, 100 

 2, 400 

 500 

 2,300 

 1,500 



1, 900 



2, 100 



Soil 

 4B. 



S0U4A. 



0.56 

 .80 

 .68 



■99 

 I. 46 

 I. 179 

 1.8 



1,500 



1, 600 

 500 



2, 100 

 I, 700 



3, 100 

 3,300 



1, 400 

 1,500 

 1,500 



2, 900 

 2, 700 

 3,200 

 6,300 



o. 021 

 025 

 010 



032 

 039 

 045 

 064 



SoilsB. 



Soil 

 3A. 



I, 700 

 I, 100 

 I, 100 

 3,400 

 I, 900 

 3,800 

 4, 200 



0.075 

 049 

 017 

 061 

 041 

 051 

 043 



Soil4B. 



Soil 



4A. 



1,500 

 2, 100 

 1,800 

 2, 600 

 3,800 



4, 600 

 4,900 



0.031 

 031 

 012 



033 

 038 

 050 

 041 



" C. 

 3. 070 

 . 076 



•77 

 . ogi 

 . 102 

 . 100 

 •079 



Soil 

 2B. 



o. 041 

 . 041 



•045 

 . 060 

 .068 

 .081 

 . 096 



Soil 

 3B. 



D. 056 

 •037 

 •037 

 •095 

 . 050 

 .089 

 •059 



SoU 

 4B. 



o. 029 



.048 

 .044 

 • 034 



. 067 

 . 069 



.049 



a Soils I, 2, 3, 4, s, and 6 calculated to 22 per cent of moisture. Soils 7, 8, 9, 10, 11, la, and 14 calculated 

 to 17 per cent of moisture. 



