CONCLUDING REMARKS
The student who wishes to pursue the study of geology further is advised to read Sir Charles Lyell's Principles of Geology. The book is out of print, but secondhand copies usually can be obtained. It is the only work yet written which gives fully the philosophy of the subject. Prof. J. W. Judd's edition of Lyell's Students' Elements is a good standard textbook. Larger ones are Sir Archibald Geikie's Textbook of Geology and the magnificently illustrated Geology, by Professors Chamberlin and Salisbury, either in the single-volume edition or the three-volume edition. For South African geology there is Dr. A. W. Rogers's Geology of Cape Colony, and Drs. Hatch and Corstorphine's Geology of South Africa. The student would do well, however, to obtain the publications of the Geological Survey of Cape Colony and of the Transvaal. Geological maps are issued by these, which can be obtained at a reasonable price. The South African fossils are published in the very fine series of memoirs issued conjointly by the South African Museum and the Cape Geological Survey. Other publications that should be consulted are the Transactions of the Geological Society of South Africa, Johannesburg; the Transactions of the South African Philosophical Society, now the Royal Society of South Africa; the Annual Reports of the South African Association for the Advancement of Science; and the Records of the Albany Museum, Grahamstown. The standard geological magazines, in which articles on South African geology are constantly appearing, are: the Quarterly Journal of the Geological Society, London; the Geological Magazine,
