128 



NATURE 



[September 26, 1912 



are accompanied with field notes, and in the case 

 of some of the Batrachia the authors have been able 

 to give a short accoimt of the larval metamorphosis. — 

 Dr. Drcyer: The salivary and mouth glands of the 

 Xudibranchiata. — W. T. Saxton: The leaf-spots of 

 R'lchanlia albo-maculala, Hook. The author describes 

 I he structure and development of the white streaks 

 characteristic of the leaves of two species of Richardia, 

 and discusses their origin. — Dr. R. Marloth : Some new 

 or little known South African succulents. 



BOOKS RECEIVED. 



Parallel Paths : a Study in Biology, Ethics, and 

 Art. By T. W. Rolleston. Pp. xv + acjg. (London : 

 Duckworth and Co.) 2s. 6d. net. 



Compendio Elemental de Zoologia. By A. Gallardo. 

 Pp. 360. (Buenos Aires : Angel Estrada y Cia.) 



Handbook of Fungus Diseases of the Potato in 

 Australia and their Treatment. By D. McAlpine. 

 Pp. iii + 215+i map. (Melbourne: J. Kemp.) 



Gravitation. By F. Harris. Pp. xi + ioy. (Lon- 

 don : Longmans and Co.) 2s. 6d. net. 



Proceedings of the .Aristotelian Society. New Series. 

 Vol. xii. Pp. 345. (London : Williams and Norgate.) 

 \os. 6d. net. 



Butterflies and Moths at Home and ."Xbroad. By 

 H. Rowland-Brown. Pp. 271 + 21 plates. (London: 

 T. F. Unwin.) 7^. 6d. net. 



China.. Ergebnisse eigener Reisen und darauf 

 gegriindeter Studien. By F. v. Richthofen. Dritter 

 Band, Das siidliche China. Edited by E. Tiessen. 

 Pp. xxxi + 817 + 5 plates. Fiinfter Band, enthaltend 

 die abschliessende palreontologische Bearbeitung der 

 Sammlungen F. von Richtliofens, die L'ntersuchung 

 weiterer Fossiler Reste aus den von ihm bereisten 

 Provinzen sowie den Entwurf einer erdgeschicht- 

 lirhen Llebersicht China's. By Dr. F. Freeh. Pp. 

 xii + 289 + 31 plates. 



Atlas von China. Orographische imd geologische 

 Karten von F. von Richthofen, zu des Verfassers 

 W'erk — China : Ergebnisse eigener Reisen und darauf 

 gegriindeter Studien. Zweite .^btheilung. Das siid- 

 liche China (zum dritten Textband gehorig). By 

 Dr. M. Groll. Pp. 12 + plates 27-54. (Berlin: D. 

 Reinier.) Band IIL and V., 32 marks; Atlas, 52 

 marks. 



Modern I\esearch in Organic Chemistry. By F. G. 

 Pope. Pp. xii + 324. (London: Methuen and Co., 

 Ltd.) 7.S. 6d. 



\ Second Year Course of Organic Chemistrv for 

 Technical Institutes. By F. B. thole. Pp. vii+186. 

 (London : Methuen and Co., Ltd.) 2s. 6d. 



Chrysanthemums. By T. Stevenson, with chapters 

 by C. H. Payne and C. E. Shea. Pp. xiii-i-112 + 8 

 coloured plates. (London and Edinburgh : T. C. and 

 E. C. Jack.) I.';. 6d. net. 



Heredity and Eugenics. By W. E. Castle, J. M. 

 Coulter, and others. Pp. vii4-3i5. (Chicago: The 

 L'niversity of Chicago Press; Cambridge University 

 Press.) 10s. net. 



Papers and Proceedings, Sixth .Annual Meeting, 

 .American Sociological Society, held at Washington, 

 D.C. December 27-30, igii. Vol. vi. Pp. v+ioi. 

 (Chicago, 111.: The University of Chicago Press; 

 Cambridge University Press.) 6s. net. 



Theories of Solutions. By S., Arrhenivis. 

 247. (New Haven : Yale University Press ; 

 H. Frowde.) 12s. 6d. net. 



The Elementary Geograph;-. By F. D. 

 son. Vol. v., pp. vi+ 152 4-4 maps. Vol. 

 vi+ 186 + 4 maps. (London: H. Frowde) 

 and IS. qd. 



Transactions of the American Inslilute of Chemical 



Pp. XX + 



London : 



Herbert- 



vi., pp. 



IS. (id. 



Engineers. Vol. iv., igii. Pp. iv + 514. (New 

 York: D. van Nostrand Co.; London : E. and F. N. 

 Spon, Ltd.) 30i. net. 



Practical Geometry and Graphics. By E. L. Bates 

 and F. Charlesworth. Pp. viii + 621. (London: 

 B. T. Batsford.) 4s. net. 



Practical Mathematics. By E. L. Bates and F. 

 Charlesworth. P[). viii + 513. (London: B. T. Bats- 

 ford.) 3s. net. 



Wild Life in l\v West Highlands. By C. H. 

 Alston. Pp. X + 271. (Glasgow: J. MacLehose and 

 Sons.) 6s. net. 



Scientific M(nhod : its Philosophy and its Practice. 

 By F. W. Westaway. Pp. xix + 43q. (London : 

 Blackie and Son, Ltd.) 6s. 



South African Geology. By Prof. E. H. L. 

 Sehwarz. Pp. vi + 200. (London: Blackie and Son, 

 Ltd.) 3s. 6d. net. 



Anales de Psicologia. Volumen ii. By .\. Floren- 

 tine and others. Pp. 360. (Buenos Aires : LaSemaua 

 Medica. Imp. de Obras de e. Spinelli.) 



The Concrete Institute. Transactions and Notes. 

 Vol. iv. Part ii. (London : The Concrete Institute.) 



Photographv of To-day. By H. Chapman Jones. 

 Pp. 342. (London : Seeley, Service and Co., Ltd.) 

 5s. net. 



The Humble-bee: its Life- history and How to 

 Domesticate it. With Descriptions of all the British 

 Species of Bombus and Psithynus. By F. W. L. 

 Sladen. Pp. xiii + 283. (London: Macmillan und 

 Co., Ltd.) los. net. 



La Tecnica delle Correnti Alternate. By Prof. G. 

 Sartori. Volume Primo. Seconda edizione ampliata. 

 Pp. xiv + S58. (Milano : U. Hoepli.) 



CONTENTS. PAGE 



Scientific Pedafcogy. By J. A. G 99 



Atomic Dynamics. By H. G 100 



Modern Road Construction 100 



Historical Geodesy loi 



Our Bookshelf 102 



Letters to the Editor: — 



Further Researches into Induced Cell Reproduction 



and Cancel.— Sir Ronald Ross, K.C.B,, F.R.S. 102 

 A Flower-sanctuary. — Right Hon. Sir Edward 



Fry, G.C.B., F.R.S 102 



William Higtjins and the Imponderable Elements. — 



A. U. N." 103 



Glacialion and -Striation. — Rev. Dr. A. Irving . , 103 



Bird-migration. {Illiislrated.) 104 



The Question of the Biplane versus the Monoplane. 



By G. H. B 106 



The International Meteorological Committee — 



Weather Telegraphy and Maritime Meteorology 107 

 Scientific Collections of the German Central 

 Africa Expedition of 1907-1908. By Sir H. H. 



Johnston, G. CM. G., K.C.B no 



Notes Ill 



Our Astronomical Column : — 



Comet 1912(7 (Gale) 114 



Reported Meteoric Fall in France 115 



The Galactic Distribution of Certain .Stellar Types . 115 



Kadio-active Elements in Celestial Bodies 115 



The Physical Chemistry of the Loaf. By E. F. A. 115 



Agriculture in India 115 



The British Association at Dundee : 



Section F. — Kconomic Science and Statistics. — 

 {With Duii;rams.) From the Opening Address hy 

 SirHenry H. Cunynghame, K.C.B., President 



of the Section 116 



Section H. — .\ntliro|ioloi>v. — Opening Address bv 

 Prof. G. Elliot Smith, M.A., M.D., Ch.M.', 



F.R.S., President of the Section 118 



University and Educational Intelligence 126 



Societies and Academies 127 



I Books Received 128 



NO. 2239, VOL. go] 



