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GENERAL ASTRONOMY. By H. SPENCER JONES, M.A., B.Sc., Senior 

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ASTRONOMICAL DISCOVERY. By H. H. TURNER, D.Sc., F.R.S., 



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ISOTOPES. By F. W. ASTON, D.Sc., M.A., F.R.S., Fellow of Trinity 

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IONS, ELECTRONS, AND IONIZING RADIATIONS. By J. A. 



CROWTHER, M.A., Sc.D., University Lecturer in Physics as applied to Medical 

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THE BECQUEREL RAYS AND THE PROPERTIES OF RADIUM. 



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AN INTRODUCTION TO THE THEORY OF OPTICS. By Sir 



ARTHUR SCHUSTER, Sc.D., F.R.S., Honorary Professor of Physics in the Victoria 

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THE DYNAMICAL THEORY OF SOUND. By HORACE LAMB, D.Sc., 

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[New Edition in Preparation. 



COLOUR VISION. A Discussion of the Leading Phenomena and 

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AERONAUTICS IN THEORY AND EXPERIMENT. By W. L. 



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NAVIGATION NOTES AND EXAMPLES. By Instructor Captain 

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AIR NAVIGATION NOTES AND EXAMPLES. By Instructor 

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A TEXT-BOOK OF PHYSICS. By R. S. WILLOWS, M.A. (Camb.), 

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 SECOND EDITION. SIXTH IMPRESSION, viii + 520 pages, with 320 diagrams. 

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HEAT. By W. J. R. CALVERT, M.A., Harrow School, viii + 344 pages, 

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ELECTRICITY AND MAGNETISM. By C. E. ASHFORD, M.A., 

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