DISCOVERY 



311 



The Outline of History. Reader's Edition. Bj- H. G. 

 Wells. (Cassell, 21s.) 

 This is an edition of Mr. Wells' remarkably fine history 

 less sumptuous as regards illustration than that appearing 

 in fortnightly parts, and consequently much cheaper. 



New Studies of a Great Inheritance. By Prof. R. S. 

 Co.NW.VY. (John Murray, 12s. 6i.) 

 This book consists of lectures designed to represent 

 some of the elements in the work of ancient writers which 

 make their study of permanent value. 



Letters of Mark Twain. (Chatto & Windus, iSs.) 



This book contains also a biographical sketch and 

 commentary on the letters, by Albert Bigelow Paine. 



The Elements of Practical Psycho-Analysis. By Dr. 

 Paul Bou.sfield. (Kegan Paul, los. 6d.) 

 An account by a Harley Street man of the theory, 

 technique, and scope of psycho-analysis in a, form that 

 may readily be understood by the student 



The Advancement of Science, 1920. (John Murray, 

 6s.) 

 The addresses by the President of the British Associa- 

 tion and of the Presidents of the twelve sections delivered 

 at the Cardiff meeting in Ausrust. 



Potatoes from Seeds 



By Miss S. R. Graham 



H.WE you ever speculated on the small shiny black 

 balls sometimes seen on potato-haulms after the flowers 

 have fallen ? I often have, and wondered why the tiny 

 seeds inside them could not reproduce their species 

 like other seeds, and wh}' potatoes must always be 

 grown from tubers or " sets." 



I was never able to obtain an 3^ satisfactory reason, 

 and was always put off by the usual statements, " Oh ! 

 you can't grow potatoes like that. They only grow 

 from 'sets'"; and when I persisted, and still asked 

 why, no one seemed to know. 



At last, however, my childish problem has been 

 solved (in this country) b\' an enterprising firm of 

 seedsmen, who, after having experimented w^ith these 

 seeds, has put them on the market, in the usual form, 

 and offers prizes to growers obtaining the best results. 



The outcome has been most interesting, for dozens 

 of potatoes, of different shapes and sizes and colours, 

 have resulted from the trials already made, and it is 

 hoped that more far-reaching ends may yet be arrived 

 at when more time has clasped in which to study 

 the behaviour of the descendants of these potatoes 

 bred on this new plan. 



IConlinued on p. 3i» 



T.Fisherllnwin'sBooks 



A NATURALIST ON LAKE VIC- 



TORIA. With an Account of Sleeping Sickness 

 and the Tsetse Fly. By G. D. Hale Carpenter, 

 D.M., B.Ch. (0.\on), Uganda Medical Service. 

 Illustraled, cloth. iSs. net. 



WEST AFRICAN FORESTS AND 



FORESTRY. By A. Harold Unwin, D.Oec. 

 Illustrated, cloth. 63X. net. 



This work is the result of thirteen years' exceptional ex- 

 perience of foiestry work in West Africa. 



THE OUTDOOR BOTANIST. A 



Simple Manual for the Study of British Plants in 

 the Field. By A. R. Horwood, F.L.S. Illus- 

 trated. 18s. net. 



Ssnd for a co^y of the Illustrated Prospeettts. 



REMINISCENCES AND ANTICIPA- 

 TIONS. By Professor J. Joi,y, Sc.D., F.R.S., 

 autiior of "The Birth-Time of the World." Illus- 

 trated, cloth. i5i. net. 



Essays on Perpetual Motion, The Origin of the Submarine, 

 etc. etc. 



THE PSYCHOPATHOLOGY OF 



EVERYDAY LIFE. By Professor Sigmund 

 Freud, LL.U. Authorised English Edition, with 

 an Introduction by A. A. Brill, Ph.B., M.D. 

 Seventh Impression. Cloth. \2S. 6d. net. 



"The book is extraordinarily interesting and full of hints 

 for the student of hitman nature." — Nature. ,.- . ..^',- 



INSTINCTS OF 

 PEACE AND WAR 



vised and Enlarged. Fifth I.mi'RESSIon, 

 is. td. net. 



" .\n exceedingly original essay on individual and social 

 psychology." — The New Statesman. 



THE HERD IN 



By W. Trotter. Ke- 

 Cloth. 



BOOKS BY J. H. FAB RE 



Illustrated. Cloth, ioj. 0,/. net c.acli. 



THE WONDERS OF INSTINCT: Chapters 



in the Psychology of Insects. 



SOCIAL LIFE IN THE INSECT WORLD 



Send for a Copy of Mr. T. FIsber Uawin's 

 NEW AUTUMN ANNOUNCEMENT LIST 



T. FISHER UNWIN L^- 



1 ADELPHI TERRACE, LONDON, W.C. 



