18 Transactions of the South African Philosophical Society. 



Unfortunately the sandstone range of the Zwartbergs so overshadows 

 the locaUties whence were collected the only three of our samples 

 which represent the area of the Cango beds that the exact extent to 

 which they typify these beds cannot yet be gauged. The following 

 are the three soils referred to : — 



IV. CANGO BEDS. 



Serial 

 No. 



Division. 



Farm. 



Fine 

 Earth. 



Water. 



Organic 

 Matter. 



Lime. 



Potash. 



Phos- 

 phoric 

 Oxide. 



35 

 36 

 37 



Oudtshoorn 



Lemrick 



Welgevonden ... 

 Matjes Eivier ... 



58-6 

 76-0 

 61-6 



1-11 

 1-90 

 315 



3-68 

 510 

 17-14 



•068 



■084 



7-460 



-194 

 -144 

 -087 



•123 

 •067 

 ■166 



Nothing need be said to emphasise the great difference between 

 the first two and the last of these three soils. 



We have now to turn our attention to a class of soils of still more 

 pronounced calcareous type. As in the south-western corner of the 

 Colony the pre-Cape rocks comprise largely the Malmesbury clay- 

 slates and shales, so in the northern part we have the series of rocks 

 which, over thirty years ago, Stow associated with the name of the 

 Campbell Eand — that range of precipitous cliffs which terminate 

 the Great Kaap Plateau towards the south-east, and flank at first 

 the Vaal and subsequently the Harts Eiver for a distance of over 

 a hundred miles from the junction of the former with the Orange 

 River below Campbell. Limestone and dolomite enter largely into 

 the formation of these rocks, and extend westward and northward 

 as far as Yryburg. 



In the soils representative of this series we must consequently 

 expect to find large quantities of lime ; here and there, however, the 

 quartzites and sandstones of the superimposed Griquatown series 

 become apparent, and considerably diminish the proportions of 

 available lime. 



The following table shows the results of analyses of these soils : — 



V. CAMPBELL RAND SOILS. 



Serial 

 No. 



Division. 



Farm. 



Fine 

 Earth. 



Water. 



Organic 

 Matter. 



Lime. 



Potash. 



Phos- 

 phoric 

 Oxide. 



38 



Kuruman 



Kuruman 



764 



101 



l-iS 



•026 



•024 



•024 



39 







100 



3--;6 



38-22 



3 66 



•030 



■132 



40 







88-7 



2-89 



7 54 



4^80 



•084 



•088 



41 







85-2 



3-54 



4-99 



6-32 



•059 



•056 



42 







947 



416 



675 



1404 



•028 



•059 



43 







871 



1.86 



213 



•278 



•068 



-026 



44 



Vryburg 



Geluk 



896 



•92 



163 



•062 



•020 



■013 



