DRAPERS' RESEARCH MEMOIRS. 



Department of Applied Mathematics, University College, London. 



(University of London.) 



BIOMETRIC SERIES. 



I. Mathematical Contributions to the Theory of Evolution (Parts 

 I-XII are published in the Philosophical Transactions of the Royal Society). 

 XIII. On the Theory of Contingency and its Relation to Association and 

 Normal Correlation. By Kakl Pearson, F.R.S. 1904. 4to. With 

 2 diagrams. 4J-. 



II. Mathematical Contributions, etc. XIV. On the General 

 Theory of Skew Correlation and Non-Linear Regression. By Karl 

 Pearson, F.R.S. 1905. 410. With 5 diagrams. 5^. 



III. Mathematical Contributions, etc. XV. On Homotyposis in 

 the Animal Kingdom. By Ernest Warren, D.Sc. , Alice Lee, D.Sc, 

 Edna Lea-Smith, Marion Radford, and Karl Pearson, F.R.S. 

 (Sho7'tly.) 



TECHNICAL SERIES. 



I. On the Theory of Stresses in Crane and Coupling Hooks, with 

 Experimental Comparison with existing Theory. By E. S. Andrews, B.Sc, 

 with some assistance from Karl Pearson, F.R.S. 1904. 4to. With 13 

 diagrams. 3^. 



II. On some Disregarded Points in the Stability of Masonry 

 Dams. By L. W. Atcherley, with some assistance from Karl Pearson, 

 F.R.S. 1904. 4to. With i figure in the text and 3 plates. 35. 6^/. 



III. On the Graphics of Metal Arches, with special reference to 

 the relative strength of two-pivoted, three-pivoted, and built-in Metal Arches. 

 By L. W. Atcherley and Karl Pearson, F.R.S. 1905. 4to. With 3 

 plates. 5^-. 



IV. On Torsional Vibrations in Axles and Shafting. By Karl 

 Pearson, F.R.S. 1905. With 3 figures in the text and 13 lithographed 

 tables and plates. 6^. 



V. A Further Study of the Stresses in Masonry Dams. By Karl 

 Pearson, F.R.S., and A. F. C. Pollard, assisted by C. Wheen. {SIi07-tly.) 



STUDIES IN NATIONAL DETERIORATION. 



I. On the Relation of Fertility in Man to Social Status, and on 

 the Changes in this Relation that have taken place during the last Fifty 

 Years. By David Heron, M.A. 4to. 35. 



JUST PUBLISHED. 



ILLUSTRATIONS OF 



BRITISH BLOOD-SUCKING FLIES. 



With Notes by Ernest Edward Austen. 



Printed by order of the Trustees of the British Museum. 



1906. Soyal 8vo. 34 plates. £1 5s. 



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