13 
—in Basutoland, in the Orange River Free State, in 
Griqualand West, in the Transvaal Territory, in Zululand, 
at Natal, and in the Transkei Territory. 
Exrract From Prerace.—‘ Appended to the Report of the Colonial 
Botanist at the Cape of Good Hope for 1866 was an abstract of a Memoir 
prepared on the Hydrology of South Africa, which has since been 
embodied in a volume which has been published on that subject, and an 
abstract of « Memoir prepared on Irrigation and its application to 
agricultural operations in South Africa, which em)raced a Report on 
the Water Supply of the Colony ; its sources, its quantity, the modes of 
irrigation required in different circumstances, the facilities for the adop- 
tion of these in different districts, and the difficulties, physical and 
other, in the way of works of extensive irrigation being carried out 
there, and the means of accomplishing these which are at command. 
‘In the following volume is embodied that portion of the Memoir 
which related to the water supply, and the existing facilities for the 
storage of this, with reports relative to this which were subsequently 
received, and similar information in regard to lands beyond the Colony 
of the Cape of Good Hope, which it has been sought to connect with the 
Colony by federation, or otherwise ; and the information relative to 
irrigation has been transferred to a Report on the Rivers of the Colony, 
and the means of controlling floods, of preventing inundations, of 
regulating the flow of rivers, and utilising the water by irrigation 
otherwise. 
‘In the series of volumes to which this belongs its place is immedi- 
ately after that on the Hydrology of South Africa, which contains 
details of the former hydrographic condition of the Cape of Good Hope, 
and of causes of its present aridity, with suggestions of appropriate 
remedies for this aridity ; and it has been prepared to show that, not 
in a vague and general use of the terms, but in strict accordance with 
the statement, the severe, protracted, and extensive droughts, and 
destructive floods and, inundations, recorded in the former volume, find 
their counterpart in constantly alternating droughts and deluges in 
every district of the Colony,—and that, in every so-called division of it, 
notwithstanding the deluges, there were protracted sufferings from 
drought, and, notwithstanding the aridity, there is a supply of water 
at command, with existing facilities for the storage of the superabundant 
supply which at present proves productive of more evil than good.’ 
Statement by Reviewer in Huropean M ail :—* Dr Brown is well known 
at the Cape, for in the exercise of his duties he travelled over the prin- 
cipal part of it, and much, if not indeed the substance, of the bulky 
volume before us, has heen before the Cape public in the form of Reports 
to the local Government. As these reports have been commented upon 
over and over again by the local press there is little left for us to say 
beyond the fact that the author reiterates his opinion that the only 
panacea for the drought is to erect dams and other irrigation works for 
the storage of water when the rains come down. There can be no doubt 
