As commercial geography is one of the sides from which geography appeals most strongly to the general reader, we may note that the classic is G. G. Chisholm's _Handbook of Commercial Geography_ (New York: Longmans, Green & Co., price $4.80 net). First published in 1889 it is brought up to date in successive editions, and is full of interest for the general public as well as for the geographer. In the same connection we may note J. G. Bartholomew's admirable _Atlas of the World's Commerce_ (London: George Newnes, 1907, price 10_s._ 6_d._), which is of great assistance in studying the subject owing to its very clear maps and diagrams. A smaller and cheaper work by the same author is _A School Economic Atlas_ (Oxford: University Press, 1910, price 2_s._ 6_d._ net). There are an enormous number of small books on geographical subjects, for these as well as for others reference may be made to a useful little volume called _Guide to Geographical Books and Appliances_, which is compiled by members of the Geographical Association (London: Geo. Philip, 1910, price 5_s._). This is especially intended for teachers, but gives full descriptions, with critical notes, of a great number of books. To the list given there we may add one book which, though intended for school use, may be noted as containing a great deal of information of the kind which is just beginning to find its way into the smaller text-books. This is Unstead and Taylor's _General and Regional Geography for Students_ (London: Geo. Philip, 1910, price 6_s._). An excellent practical book is Simmons and Richardson's _Introduction to Practical Geography_ (New York: The Macmillan Co., 1907, price 90 cts.). Finally, we may note that the _Geographical Journal_, published monthly by the Royal Geographical Society in London, and the _Scottish Geographical Magazine_, published monthly by the Royal Scottish Geographical Society in Edinburgh, both give reviews and accounts of all important geographical books, as they appear, with abstracts of important articles and papers, as well as publishing original papers. Both are obtainable at most libraries. INDEX Aar valley, 57, 67 Aberdeen, 44 Abyssal fauna, 145 Abysses of ocean, 28 Acacia, 79 Africa, climate of, 91, 100; exploration of, 13; fauna of, 23, 152; forests of, 120; position of, 22; slave trade in, 236 Agave, 85, 125 Ague, 162 Ailanthus, 78 Aire gap, 47 (fig. 5), 49, 73 Alabama, 35 Alaska, forests of, 136; minerals of, 220 Algiers, means of communication in, 240; rainfall of, 95; vegetation of, 92 Allium, 124 Almonds, 176 Alnwick, 232 Aloe, 125 _Alp_, 59, 60, 190 Alpine plants, 122 Alpine race, 190, 192, 199, 206-216 Alps, 32, 33, 57, 58, 59, 68, 70, 80, 122, 192, 241 Amazon, 43, 45 America, exploration of, 14