42 Alfred J. Ewart : 



during the median portion of the year. From September on- 

 wards the temperature became higher, and the percentage of 

 soil water decreased, especiaiUy in the upper layers of the soil. 

 Both soils were wettest in July, driest in December. 



Date 



Percentage of Water. 

 Clay Soil Fine Sandy Soil 



Top Sin. 16in. 



May 18 - 18.2 17.5 17.2 



June 20 - 7.75 12.2 11.1 



July 20 - 44.5 42.5 44.5 



Aug. 25 - 24.25 25.25 23.5 



Sept. 25 - 19.0 20.5 22.5 



Temperature (Fahr. ) of Each In Situ. 



Clay Soil Fine Sandy Soil 



Top Sin. 16in. Top Sin. 16in. 



Juue 20 - 50 deg. 49.5 cleg. 47 deg. - 51 deg. 50 deg. 51 deg. 



July 20 - 46 „ 45 „ 45 „ - 41 „ 43 „ 43 „ 



Aug. 25 - 50 „ 49.5 „ 51 „ - 51 „ 50 ,, 51 „ 



Sept. 25 - 66 „ 61 ,, 60 „ - 65 „ 60 „ 56 „ 



Great difficulty was found in obtaining clear watery filtrates 

 from the clay soil without filtering through biscuit porcelain, 

 whicli is tedious with large bulks, and is apt to cause the 

 loss of some of the materials really held, originally, in solution. 

 The acid extracts filter readily, but this part of the work was 

 confined to the sandy soils, «ince the residues from the watery 

 extracts of the clay soil are not at all reliable. 



The following are two sets of data from the clay soils in 

 May and September, i.e., before and after the main rainfall, 

 the numbers giving the amount of matter dissolved by 2 litres' 

 of water from 1 kilogram of dry soil, plus the amount of non- 

 settling suspended matter able to pass through doubled filter-paper: 



