197 



It will be observed that the 22 soils from the divisions of Kenhardt, 

 Mafekiug, and Vryburg a widely extended area where the geological for- 

 mation may be said to correspond in some sort to that of the south-western 

 corner of the Colony, inasmuch as sandstone and quartzite enter largely 

 into the composition of the soil are again of a coarser texture, their pro- 

 portion of fine earth averaging 85 '0. 



The Division of George is naturally divided into a northern and a 

 southern portion by the great range of the Outeniquas : the northern part 

 continues into the Uniondale Division, and of the southern the Knysna 

 Division is the natural continuation. In each case there is a corresponding 

 similarity in the texture of the soil, as the following shows : 



No. of samples Percentage of 



Area. examined. fine earth. 



George, northern part 9 69-2 



Uniondale... 12 69 -3 



George, southern part 

 Knysna 



14 



94-0 

 94-9 



While fairly complete mechanical analyses have been comparatively 

 few, a number of soils have been graded in greater detail than those re- 

 ferred to above ; some of these are tabulated below : 



Division. 



Albert 



Richmond 

 Tulbagh 



Uitenhage 



Vryburg 



Serial No. 

 in list of 

 samples. 



1 



2 



3 



10 

 11 

 12 

 38 



1 



2 



3 



1 



65 

 66 

 67 

 68 

 69 

 70 



1 



2 



1 



2 



3 



6 



1 



2 



3 



4 



5 



6 



7 



8 



9 

 10 

 10 



Pebbles^ 

 > 1 mm. 



nil 



1-5 



2-0 



0-7 



3-2 



1-5 



0-8 



1-2 

 9 

 9 



nil 

 15-8 

 10-1 

 10-0 

 12-0 

 14-6 

 12-4 



7-7 



5-8 

 34-9 

 54-6 

 54-0 



2-1 



nil 



nil 



nil 



0-4 



0-4 



nil 



0-2 



0-5 



0-2 



nil 



2-1 



Coarse 



nil 



3-9 



2-8 



1-1 



0-2 



0'9 



17-6 



4-0 



3-6 



3-7 



2-8 



12-2 



16-1 



10-0 



15-8 



17-4 



1T6 



6-0 



3-1 



15-8 



6-5 



21-6 



3-1 



0-5 



1-1 



0-9 



1-6 



5-4 



1-6 



0'2 



3-7 



0-6 



nil 



8-3 



Fine 



earth 



< i mm. 



100 

 94-6 

 95-2 

 98-2 

 96-6 

 97-6 

 81-6 

 94-8 

 95-5 

 95-4 

 97'2 

 72-0 

 73-8 

 80'0 

 72-2 

 68-0 

 76-0 

 86-3 

 91-1 

 49-3 

 38-9 

 24-4 

 94*8 

 99-5 

 98-9 

 99-1 

 98-3 

 93-2 

 98-4 

 99-6 

 95-8 

 99-2 

 100 



In the three orchard soils, Nos. 31, 32, and 33, collected in the Worcester 

 Division, the proportions of silt and clay were found to be respectively 

 17'3, 14'2, and lO'O. Soils of this description, containing over 75 per cent, 

 of fine earth, whereof less than 20 per cent, is composed of silt and clay, 

 and hence containing at least 55 per cent, of more or less fine sand, may 

 very well be classified as medium sands. 



