mbridge University Press, Fetter Lane, London, E.C., and their Agents, 

 z now the sole agents for the sale of the following publications of the 

 'Iton and Biometric Laboratories, University of London: 



BIOMETRIC LABORATORY PUBLICATIONS 

 Drapers' Company Research Memoirs. 



Biometric Series. 



.ematical Contributions to the 



rheoryof Evolution. XIII. On the Theory 

 >f Contingency and its Relation to Associa- 

 .ion and Normal Correlation. By KARL 

 'KARSON, F.R.S. Price 4s. net. 

 athematical Contributions to the 

 Theoryof Evolution. XIV. On the Theory 

 of Skew Correlation and Non-linear Regres- 

 sion. By KARL PEARSON, F.R.S. Price 5s. 

 'let. 



athematical Contributions to the 

 Theory of Evolution. XV. On the Mathe- 

 natical Theory of Random Migration. By 

 .KARL PEARSON, F.R.S., with the assistance 

 jf JOHN BLAKEMAN, M.Sc. Price 5s. net. 

 athematical Contributions to the 

 Theory of Evolution. XVI. On Further 

 Methods of Measuring Correlation. By 

 KARL PEARSON, F.R.S. Price 4s. net. 



V. Mathematical Contributions to the 



Theory of Evolution. XVII. On Homo- 

 typosis in the Animal Kingdom. A Co- 

 operative Study. [Shortly. 



VI. Albinism in Man. By KARL PEARSON, 



E. NETTLESHIP, and C. H. USHER. Text, 

 Part I, and Atlas, Part I. Price 35s. net. 



VII. Mathematical Contributions to the 



Theory of Evolution. XVIII. On a Novel 

 Method of Regarding the Association of 

 two Variates classed solely in Alternative 

 Categories. By KARL PEARSON, F.R.S. 

 Price 4s. net. 



VIII. Albinism in Man. By KARL PEARSON, 



E. NETTLESHIP, and C. H. USHER. Text, 

 Part II, and Atlas, Part II. Price 30s. net. 



IX. Albinism in Man. By KARL PEARSON, 



E. NETTLESHIP, and C. H. USHER. Text, 

 Part IV, and Atlas, Part IV. Price 21 s. net. 



Studies in National Deterioration. 



U the Relation of Fertility in Man 



to Social Status, and on the changes in this 



(Relation that have taken place in the last 



50 years. By DAVID HERON, M.A., D.Sc. 



Price 3s. net. Sold only with complete sets. 

 First Study of the Statistics of 



IPulmonary Tuberculosis (Inheritance). By 

 KARL PEARSON, F.R.S. Price 3s. net. 

 Second Study of the Statistics of 

 Pulmonary Tuberculosis. Marital Infec- 



rtiou. By ERNEST G. POPE, revised by KARL 

 PEARSON, F.R.S. With an Appendix on 



Assortative Mating by ETHEL M. ELDERTON. 

 Price 3s. net. 



Ihe Health of the School-Child in re- 

 lation to its Mental Characters. By KARL 

 PEARSON, F.R.S. [Shortly. 



m the Inheritance of the Diathesis 

 of Phthisis and Insanity. A Statistical 

 Study based upon the Family History of 

 1,500 Criminals. By CHARLES GORING, 

 M.D., B.Sc. Price 3s. net. 



VL A Third Study of the Statistics of 



Pulmonary Tuberculosis. The Mortality 

 of the Tuberculous and Sanatorium Treat- 

 ment. By W. P. ELDERTON, F.I. A., and 

 S. J. PERRY, A.I.A. Price 3s. net. 



VII. On the Intensity of Natural Selection 



in Man. (On the Relation of Darwinism 

 to the Infantile Death-rate.) By E. C. 

 SNOW, D.Sc. Price 3s. net. 



VIII. A Fourth Study of the Statistics of 



Pulmonary Tuberculosis : the Mortality of 

 the Tuberculous: Sanatorium and Tuber- 

 culin Treatment. By W. PALIN ELDERTON, 

 F.I. A., and SIDNEY J. PERRY, A. I. A. 

 Price 3s. net. 



IX. A Statistical Study of Oral Tem- 

 peratures in School Children with special 

 reference to Parental, Environmental and 

 Class Differences. By M. H. WILLIAMS, 

 M.B., JULIA BELL, M.A., and KARL 

 PEARSON, F.R.S. Price 6s. net. 



Technical Series. 



a Theory of the Stresses in Crane 



and Coupling Hooks with Experimental 

 Comparison with Existing Theory. By 

 E. S. ANDREWS, B.Sc. Eng., assisted by 

 KARL PEARSON, F.R.S. Issued. Price3s.net. 



n some Disregarded Points in the 

 Stability of Masonry Dams. By L. W. 

 ATCHERLEY, assisted by KARL PEARSON, 

 F.R.S. Issued. Price 3s. 6d. net. 



n 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.b. 

 Issued. Price 5s. net. 



IV. On Torsional Vibrations in Axles 

 and Shafting. By KARL PEARSON, F.R.S. 

 Issued. Price 6s. net. 



V. An Experimental Study of the 

 Stresses in Masonry Dams. By KARL 

 PEARSON, F.R.S., and A. F. CAMPBELL 

 POLLARD, assisted by C. W. WHEEN, B.Sc. 

 Eng., and L. F. RICHARDSON, B.A. Issued. 

 Price Is. net. 



VI. On a Practical Theory of Elliptic and 

 Pseudo-elliptic Arches, with special refer- 

 ence to the ideal Masonry Arch. By KARL 

 PEARSON, F.R.S., W. D. REYNOLDS, B.Sc. 

 Eng., and W. F. STANTON, B.Sc. Eng. 

 Issued. Price 4s. net. 



Complete sets may be purchased at 25s. net. 



