24 Transactions of the South African Philosophical Socvety. 
but it also contains a considerable extent of well-wooded alluvial 
soil, suitable for cultivation. The distance between Otjimbinque 
and Okahaudja is 73 miles, and in this distance, passing from the 
eranite to mica-schist, there were noticeable sandstone, BA -slate, 
dolerite, and limestone. 
After returning to Windhoek from Otjimbinque we proceeded 
from there eastwards to Gobabis, a military station near the eastern 
boundary of the Protectorate. Having travelled about 15 miles, 
continually ascending, from Windhoek, to a height of about 5,500 
feet, we passed away from the mica-schist and entered upon sand- 
stone formation, with lme-tufa and crystalline limestone. Then 
commenced a gradual descent to Gobabis, which les 4,400 feet 
above sea-level. For the next few miles the country is somewhat 
undulating, then a huge grassy plain is entered upon, later on giving 
place to stony bushveld, and then again becoming open and grassy. 
In these parts the natives possess large herds of cattle, but few 
sheep. 
As we approached the White Nosob River our way lay along a 
sandy flat, with very extensive alluvial soil, to some extent cultivated 
by the natives. Between 50 and 100 miles from Windhoek the soil 
not immediately along the river is at first sandy, with a subsoil of 
lime-tufa, sometimes marly, then crossed by veins of dolerite, then a 
gravelly karoo soil covered with gannabush, which is one of the 
principal sheep-fodder bushes in this Colony, and then it becomes 
hilly and stony and sandy again. 
At Witvley, about 100 miles from Windhoek, the limestone tufa 
is very much in evidence, and a considerable extent of country is 
low-lying andmarshy. For the next thirty miles, as far as Gobabis, 
which les on the Black Nosob River, the way is very sandy and 
heavy for transport, as all the eastern portion bordering on the 
Kalahari is; the underlying limestone frequently shows itself, and 
is pierced for water-supply. Here veins of sandstone and quartz 
conglomerate were very noticeable, crossing the flats as well as 
traversing the hills. At Gobabis the water-supply is obtained from 
wells, 10 feet in depth, in the sandstone. The distance from 
Windhoek to Gobabis is about 135 miles; the time occupied in 
covering it was ten days. 
From Gobabis we proceeded south-west to Rehoboth, and at 
distances of 12 and 18 miles we passed two watering-places, in lime- 
stone which crops out of the sand. About twenty-eight miles from 
Gobabis, on the White Nosob River, a few miles north of its junction 
with the Black Nosob River, lies Kaukarus, a settlement of Bechuanas. 
The people had just been very unfortunate here; most of them were 
