knowing that my money will go on doing good until, if it 

 fall not into the hand of a rogue, it is used up by some one 

 whose circumstances rendered this necessary ; " and stated, 

 "whatever amount may be realised by the sale of this volume 

 will be employed without deduction in the publication of 

 some similar work, the publication of which I may con- 

 sider likely to be useful, but not likely to command a sale 

 which would make it remunerative to a publisher to 

 publish it. I shall be glad if I can thus to some extent 

 perpetuate the good done by your gift ; and I am prepared 

 to go to press with a treatise on Reboisement in France, so 

 soon after the publication of the volume on Hydrology of 

 South Africa, as may be expedient." 



The results have been the publication of the following 

 volumes and pamphlets : 



I. Hydrology of South Africa ; or, details of the former Hydrographic 

 Condition of the Cape of Good Hope, and of causes of if.s present 

 aridity, loith suggestions of appropriate remedies for this aridity. 



In this the desiccation of South Africa, from pre-Adamic times 

 to the present day, is traced by indications supplied by geological forma- 

 tions, by the physical geopraphy or general contour of the country, and 

 by arborescent productions in the interior, with results confirmatory of 

 the opinion that the appropriate remedies are irrigation, arboriculture, 

 and an improved forest economy : or the erection of dams to prevent the 

 escape of a portion of the rainfall to the sea the abandonment or re- 

 striction of the burning of the herbage and bush in connection with 

 pastoral and agricultural operations the conservation and extension of 

 existing forests and the adoption of measures similar to the reboisement 

 and gazonnement carried out in France, with a view to prevent the for- 

 mation of torrents and the destruction of property occasioned by them. 

 London : Henry S. King & Co. 1875. Price 10s. 



II. Water Supply of South Africa, and facilities for the storage of it. 



In this volume are detailed meteorological observations on the 

 humidity of the air and the rainfall, on clouds, and winds, and thunder- 

 storms ; sources from which is derived the supply of moisture which ia 

 at present available for agricultural operations in the colony of the Cape 

 of Good Hope and regions beyond, embracing the atmosphere, the rain- 

 fall, rivers, fountains, subterranean streams and reservoirs, and the sea ; 

 and the supply of water and facilities for the storage of it in each of the 

 divisions of the colony in Basutoland, in the Orange River Free State, 

 in Griqualand West, in the Transvaal Territory, in Zululand, at Natal, 

 and in the Transkei Territory. Edinburgh : Oliver & Boyd. London i 

 Simkpin, Marshall, & Co. 1877. Price 18s 6d. 



