Soils of the South-Western Districts of the Cape Colony. 135 
Riversdale, and Mossel Bay Divisions, and the southern part of the 
Divisions of Swellendam and Robertson. Within this area 212 
samples of soil were collected. Amongst these the geological 
formations chiefly represented are the Malmesbury and Bokkeveld 
beds, 75 samples having been collected from the former and 76 from 
the latter. Besides these we have analysed 10 from the Witteberg 
beds and 6 lying on Table Mountain sandstone. In eighteen cases the 
underlying rock was granite and in one the soil rested upon a sub- 
stratum of Dwyka conglomerate, while 26 soils were taken from 
areas covered by conglomerates and recent deposits. By far the 
larger number of soils analysed, therefore, came from the geological 
formations now termed the Malmesbury and Bokkeveld beds. True 
granite soils were very few in number, but, taken in conjunction with 
a number of granite soils analysed by Dr. Hahn, and published in the 
Vine Diseases Commission’s report in 1881, some conclusions may 
possibly be drawn. It may therefore be of value to tabulate the 
percentages of lime, potash, and phosphoric oxide pallet. by these 
gelsea they are as follows :— 
Description of Soil. Lime. Potash. | P Desptere 
1. Partly decomposed granite from: Hout 
IB AINGR sosicdsio taste wa sau eaudeiesnddaceXccle ganna ae 014 002 
2. Partly decomposed granite from Groot 
Womstambias occtatecscssnds aches esuesesocdes -025 ‘O11 009 
3. Decomposed granite from Bellevue, 
Groot Sonsini Bea boam Caueee ker ae 7 0a2 053 
4. ‘3 mos, 008 {| -020.| -019 
5. Decomposed prone from High Con-}) 
SUAIlay sea soatttscessecsieceaesieoccoeset "002 cOlls 019 
6. 9 y» 0 ‘081 0438 «| | 075 
7. Decomposed granite (uncultivated, os 
Red Constantia soil) :2:........6.0.cs043- 203% "056 “Cites 
8. Alluvial granite soil from Bergyliet ...|. . °281 151 Pee: 
Oy irom Hout Bay <.:..... ia A AUR Serta ese 016 002 002 
HOM, ores 026% "O12 2 5s Oia 
‘11. Groot Constantia ........... ese oes se] 009 O15 001 
12, 5, » ) | ee 069 O40) aloud 
13, » aa we 039 031 7019 
14. Vlaggeberg, Eerste Fer II Mio actions) 018 010 (0p al 
15. ” ” yy : : : ; °181 ‘017 “O11 
16. ”7 ” : ‘063 -004 ‘007 
i, Sielicnbosol BACH SO TT TOES Irena ERS a te iniee "014 ‘019 ‘002 
DIS PSOIMERSeh WieSt.».....+00+00hee. Nie MARC ne 5 034 029 trace 
LO as 9 . é ‘080 0.25 trace 
20. Papkuilsfontein, Malmesbury ............ trace ‘049 trace 
2h, «4s “gy? ” "046 °028 ‘012 
