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 
Galto7i and Biometric Laboratories, University of London : 
Biometric Laboratory Publications 
Drapers' Company Research Memoirs. 
Biometric Series. 
II. 
III. 
IV. 
VI, 
II. 
III. 
IV. 
V. 
II. 
III. 
JV. 
Mathematical Contributions to the 
Theory of Evolutioij.— XIII. On the Theory 
of Contingency cand its Relation to Associa- 
tion and Normal Correlation. By Karl 
Pearson, F.R.S. Price 4.s. net. 
Mathematical Contributions to the 
Theory of Evolution.— XI V. On the Theory 
of Skew Correlation and Non-linear Regres- 
sion. By Karl Pearson, F.R.S. Price 5s. 
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 5.s. net. 
Mathematical Contributions to the 
Theory of Evolution. — XVI. On Further 
Methods of Measuring Correlation. By 
Kari, Pearson, F.R.S. Price As. nut. 
Mathematical Contributions to the 
Theory of Evolution.— XVII. On Homo- 
typosis in the Animal Kingdom. A Co- 
operative Study. \In preparation. 
Albinism in Man. ]5y Karl Pearson, 
E. Nettleshtp, 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 As. net. 
VIII. Albinism in Man. By Karl Pearson, 
E. Nettleshtp, 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 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 Feinur [of Man\ Text I and 
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 [tvith Special 
Reference to other Primate Femora.'] Text II 
and Atlas of Plates II. Price 40s. net. 
Studies in National Deterioration. 
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 PIeron, M.A., D.Sc. 
Price 6s. net. Sold only with complete sets. 
A First Study of the Statistics of 
Pulmonary Tuberculosis (Inheritance). By 
Karl Pearson, F.R.S. Price 6s. net. Sold 
only with complete sets. 
A Second Study of the Statistics of 
Pulmonary Tuberculosis. Marital Infec- 
tion. By Ernest G. Pope, revised by Karl 
P*; ARSON, F.R.S. With an Appendix on 
Assortative Mating by Ethel M. Elderton. 
Price 3s. net. 
The Health of the School-Child in re- 
lation to its Mental Characters. By Karl 
Pearson, F.R.S. [In prepiandiou . 
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 3s. net. 
VI. 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 'is. 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 sjjocial 
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. 
On a Theory of the Stresses in Crane 
and Coupling Hooks with Experimental 
Comparison with Existing Theory. By 
E. S. Andrews, B.Sc. Eng., a.ssisted by 
Karl Pearson, F.R.S. Issued. Price ?js. net. 
On some Disregarded Points in the 
Stability of Masonry Dams. By L. W. 
Atcherley, assisted by Karl Pearson, 
F. R.S. Issued. Price Is. net. Sold only 
with complete sets. 
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. 
Issued. Pi-ice 5s. net. 
On Torsional Vibrations in Axles 
and Shafting. By Karl Pearson, F.R.S. 
fssued. Price 6s, net, 
V. An Experimental Study of the 
Stresses in Masomy Dams. By Karl 
Pearson, F.R.S., and A. F. Campbell 
Pollard, assisted by C. W. AVheen, 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 si)ecial 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 As. 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, 
hsmd. Price 7s ^d. nef, 
