TABLE IV. RATES OF PERCOLATION, 

 UNDER SIMILAR CONDITIONS THROUGH SOILS Nos. 2 AND 4. 



That is to say that under similar conditions water percolates 

 twenty -six times as quickly through the surface light soil as through 

 the coarser material from a depth of two to three metres. 



The fact that this sandy soil is of so slightly permeable a nature 

 and that capillary movement of water is so extremely slow appears 

 to indicate that there is little likelihood of salt being brought up from 

 the lower layers unless the land were left without water for a very 

 long period. 



The following tables show the results of the analyses (mechanical 

 and chemical) of the four typical varieties of soil mentioned on page 6. 



TABLE V.- MECHANICAL ANALYSIS. 



NOTE. The "fine sand" in No. 4 (from three metres) was 

 much coarser than that in No. 2 (surface) ; the same sieve was used 

 in both cases, so that the difference must be due to the fact that in 

 one soil the majority of the particles of this fraction .approach the 

 dimensions of the upper limit (0-2 millimetre) while in the surface 



