BIRKBECK COLLEGE, Brea ' m ■cESSR, Lane, «, 



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COURSES OF STUDY. Tinder Recognised Teachers of the University of London, 

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(A. McKenzie, Ph.D., D.Sc, M.A. j C i- s . IelI /F. A. Wright, M.A. 



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(A. Griffiths, D.Sc. n Language J. S, Westlake. M.A. 

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Ready Now. A New and Cheaper Edition. 51, net. 



RECENT PROGRESS IN THE 

 STUDY OF VARIATION, 

 HEREDITY AND EVOLUTION. 



BY ROBERT H. LOCK, M.A., 



FELLOW OF GONVILLE AND CAIUS COLLEGE, CAMBRIDGE. 



With Portraits and other Illustrations. 



INTRODUCTION-EVOLUTION-THE THEORY OF NATURAL SELEC- 

 TION - BIOMETRY -THE THEOLOGY OF MUTATION -THE OLDER 

 HYBRIDISTS - MENDELISM - RECENT CYTOLOGY - EUGENICS - 



CONCLUDING CHAPTER. 



Just Out. A Cheaper Edition. 5/. net. 



THE RECENT DEVELOPMENT OF 

 PHYSICAL SCIENCE. 



BY W. C. D. WHETHAM, M.A., F.R.S., 



FELLOW OF TRINITY COLLEGE, CAMBRIDGE. 



Illustrated. 



INTRODUCTION-THE PHILOSOPHICAL BASIS OF PHYSICAL SCIENCE 

 —THE LIQUEFACTION OF GASES AND THE ABSOLUTE ZERO OF 

 TEMPERATURE — FUSION AND SOLIDIFICATION - THE PROBLEMS 

 OF SOLUTION -THE CONDUCTION OF ELECTRICITY THROUGH 

 GASES -RADIO-ACTIVITY -ATOMS AND >€THER — ASTRO-PHYSICS — 



INDEX. 



JOHN MURRAY, ALBEMARLE STREET, W. 



( ii ) 



