The Cambridge University Press, Fetter Lane, London, E.G. 4, and their Agents, 

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

 Gallon and Biometric Laboratories, University of London : 



Biometric Laboratory Publications 



Drapers' Company Research Memoirs. 



ii. 



in. 



IV. 



VI. 



I. 



II. 



III. 



IV. 



Biometric 



^Mathematical Contributions to the 



Theory of Evolution.— XIII. On the Theory 

 of Contingency and its Relation to Associa- j 

 Hon and Normal Correlation. By Karl 

 Pearson, F.R.S. Price 10s. net. 



♦Mathematical Contributions to the 

 Theory of Evolution. — XIV. On the Theory j 

 of Skew Correlation and Non-linear Regres- 

 sion. By Karl Pearson. Price 10s. net. 



Mathematical Contributions to the 

 Theory of Evolution. — XV. On the Mathe- 

 matical Theory of Random Migration. By 

 Karl Pearson, F.R.S., with the assistance 

 of John Blakeman, M.Sc. Price 5s. net. 



Mathematical Contributions to the 

 Theory of Evolution. — XVI. On Further 

 Methods of Measuring Correlation. By 

 Karl Pearson, F.R.S. Price 5s. net. 



Mathematical Contributions to the 

 Theory of Evolution. — XVII. On Homo- 

 typosis in the Animal Kingdom. A Co- 

 operative Study. [In preparation 



Albinism in Man. By Karl Pearson, 

 E. Nettleship, and C. H. Usher. Text, 

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



Series. 



VII. Mathematical Contributions to the 



Theory of Evolution.— XVIII. On a Novel 

 Method of Regarding the Association of 

 two Variates classed in Alternative Cate- 

 gories. By Karl Pearson. Price 5s. net. 



VIII. Albinism in Man. By Karl Pearson, 



E. Nettleship, and 0. H. Usher. Text, 

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



IX. Albinism in Man. By Karl Pearson, 



E. Nettleship, and 0. H. Usher. Text, 

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



X. A Monograph on the Long Bones 



of the English Skeleton. By Karl 

 Pearson, F.R.S., and Julia Bell, M.A. 

 Part I. The Femur [of Man]. Text 1 ami 

 Atlas of Plates I. Price 30s. net. 



XI. A Monograph on the Long Bones 



of the English Skeleton. By Karl 

 Pearson, F.R.S., and Julia Bell, M.A. 

 Part I, Section II. The Femur [with Special 

 Reference to other Primal'- Femora]. Text II 

 and Atlas of Plates II. Price 40s. net. 



XII. On the Sesamoids of the Knee- Joint. 



By Karl Pearson, F.R.S., and ADELAIDE 

 G. Davin, B.Sc. (Reprinted from Bio- 

 metrika.) Text and 37 Plates. Price20s.net. 



* Sold only with complete sets. 



Studies in National Deterioration. 



VI. 



I. 



On 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. 



[Out of Print 



A First Study of the Statistics of 

 Pulmonary Tuberculosis (Inheritance). By 

 Karl Pearson, F.R.S. [Out of Print 



A Second Study of the Statistics of 

 PuhnonaryTuberculosis. Marital Infection. 

 By Ernest G. Pope and Karl Pearson. 

 With an Appendix on Assortative Mating 

 by Ethel M. Elderton. Price 5s. net. 



On the Relationship of Health to the 

 Psychical and Physical Characters in School 

 Children. By Karl Pearson, F.R.S. Price 

 15s. net. 



On 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 4s. net. 

 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. LA. Price 4s. net. 



VII. On the Intensity of Natural Selection 



in Man. (On the Relation of Darwinism 

 to the Infantile Death-rate.) By E. ( '. 

 Snow, D.Sc. Price 4s. 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. LA. 

 Price 4s. net. 



IX. A Statistical Study of Oral Tem- 



peratures in School Children with special 

 reference to Parental, Environmental and 

 Class Differences. By M. II. Williams, 

 M.B., Jdlia Bell, M.A., and Karl 

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



X. Study of the Data provided by a 



Baby-Clinic in a large Manufacturing Town. 

 By Mary Noel Karn and Karl Pearson. 

 Price 15s. net. 



XI. Blood Pressure in Early Life. A 



Statistical Study. By Percy Stocks, M.D., 

 D.P.H., assisted by M. Noel Karn. Price 

 12s. net. 



Technical Series. 



On a Theory of the Stresses in Crane 



and Coupling Hooks with Experimental 

 Comparison with Existing Theory. By 

 K. S. Andrews, B.Sc. Eng., assisted by 

 Karl Pearson, F.R.S. Issued. Price 4*. net, 

 II. On some Disregarded Points in the 

 Stability of Masonry Dams. By L. W. 

 Atuiierley, assisted by Karl Pearson, 

 J". U.S. Issued. Price Is. net. Sold only 

 with complete sets. 



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. 

 m:rley and Karl Pearson, F.R.S. 

 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 

 Pkarson, F.R.S. and A. F. Campbell 



POLLARO, assisted by C. W. WhEEN, B.Sc. 



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



Price 7s. 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 6s. net. 



VII. On the Torsion resulting from Flexure 



in Prisms with Cross-sections of Uni-axial 

 Symmetry only. By A. W. Young, Ethel 

 M. Elderton and Karl Pearson, F.R.S. 

 Issued. Price 7s. 6d. net. 



