SCIENCE-ADVERTISEMENTS 



April 



fy -i will be the last day for registering orders at advance-of-pub- 

 ■~ -•■ lication prices (a saving of 50 cents on each binding) for 



The Britannica Year-Book 1213 



By the Editor of the Encyclopaedia Britannica and many of the contributors to that work. 



ORDER YOUR COPY TO-DAY 



of the only Auihoriiaiive Manual of Current Progress; written on entirely new and original lines — a Handy, 

 Useful, Full, as well as Readable and Interesting Epitome of Contemporary affairs, dealing with national and inter- 

 national politics and current history in all lands, as, for example: the last Presidential Election in the United States, 

 the Revision of the Tariff, Social Legislation, Child Labor Laws, Woman's Suffrage, the Labor Unrest, the Bal- 

 kan War, etc.; providing the most recent official statistics on industry, commerce, agriculture, etc., and a Com- 

 plete Survey of the World's Work in all departments; the only annual of comprehensive scope that deals ade- 



quately with 



THE ADVANCEMENT OF SCIENCE 



A book of special interest to scientific workers and to those who desire to keep in touch with science because it has 

 enlisted the cooperation of scientific men in setting forth authoritatively and accurately the substantial gains in 

 all departments of investigation, scientific work and thought, during 1911-1912, in all countries. It provides in 

 careful, critical reviews a general narrative survey, with the latest results, of progress in Astronomy, Geography, 

 Geology, Meteorology, Physics, Chemistry, Biology and Zoology, Botany, Anthropology, Archaeology, Philology and 

 Philosophy, covering fully subjects ignored or but meagerly dealt with in the ordinary type of year-book, and 

 covering them with authority. 



The contributors on scientific topics, with the 

 headings under which they describe recent progress, 

 include: 



Prof. H. H. Turner, Pres., Royal Astronomical Society: 

 Astronomy (Recent Work on Solar Phenomena, 

 Fluctuations of the Moon, the Minor Planets. 

 Comets and Variable Stars, etc.) 



Prof. Cleveland Abbe, of the United States Weather 

 Bureau: Meteorology (International Ballooning, 

 Aerolites, Secular Change of Climate, Sunspot 

 Influences, etc.) 



E. E. F. d'Albe, author of "The Electron Theory": 

 Physical Science (Advances of Spectroscopy, 

 Chemical Analysis by Alpha-Rays, Fused-Silica 

 Standard, etc.) 



P. C. Mitchell, F.R.S., Sec, Zoological Society, London: 

 Biology and Zoology (Disease-Bearing Arthropods, 

 the new Fossil Primate, Recent Work on Heredity, 

 Variation and Mendelism., etc.) 



W. L. H. Duckworth, of Cambridge: Physical Anthro- 

 pology (Homo-Primigenius, Andamanese and Malay 

 Aborigines, new Observations on the Brain, etc.) 



R. R, Marett, of Oxford: Cultural Anthropology (Eo- 

 liths, Palaeolithic Age, Azilians and Neolithic Age, 

 Ethnological Method, etc.) 



C. O. Blagden, joint author with Prof. W. W. Skeat of 

 "Pagan Races of the Malay Peninsula," etc.: 

 Philology (The Austric Family of Languages). 



Prof. W. M. Flinders Petrie of London: Egypt (Results 

 of recent Studies in Nubia, etc.) 



Dr. D. G. Hogarth, of the Ashmolean Museum: Hittites 

 (New Light from Excavations at Jerablus and 

 Sakjegeuzi, etc.) 



Prof. R. M. Burrows, Chairman of the Aegean Islands 

 Committee: Crete (Progress in Excavations at 

 Cnossus, Tylissus, Hagia Triada, near Gournia, 

 etc.) 



Prof. Percy Gardner of Oxford: New Light on Creek 

 Art. 



Prof. A. E. Taylor, of St. Andrews: Philosophy (Henri 

 Bergson, The New Realism, Revival of Theism, 

 Varisco, Thomism, etc.) 



THE QUICK SUCCESS 

 of the Britannica Year-Book, announced in March, is 

 easily explained. It met with singular completeness 

 a need of the hour. The vast complexity of modern 

 interests during the last year — social, scientific, 

 political, artistic, literary, industrial, commercial and 

 practical — has been subjected to an illuminative and 

 critical survey and estimate by international authorities. 

 It is World-wide in its Sweep, an Indispensable ex- 

 planatory companion to the newspaper, the magazine 

 and the technical journal. 



A BARGAIN 

 for Those Who Act At Once. The Britannica Year- 

 Book is remarkably cheap. Printed on India paper, 

 a volume i inch thick, it contains 1260 pages, 

 about 900,000 words — equal to eight or nine average 

 volumes. The purchaser receives more than 500,000 

 words for a dollar. The before-publication prices 

 are one half what other publishers would charge. 

 Readers of this notice should send remittance imme- 

 diately, in order to profit by the concession in price 

 allowed only until April 21. Sent post-paid anywhere 

 in the United States or Canada, upon receipt of price. 



[These prices to be increased by 50 cents after April 21] 



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