iv 
Contents 
PAGE 
XIV. On the Frequency Distribution of Phagocytic Counts. By M. Green- 
wood, Junr. and J. D. C. White 376 
XV. A Biometric Study of the Blood Corpuscles of the Common Tadpole. 
By Karl Pearson, F.R.S . . .402 
XVI. Data on Variation in the Comb of the Domestic Fowl. By Raymond 
Pearl, Ph.D., and Maud Dewitt Pearl 420 
Miscellanea. 
(i) Some Notes on Interpolation in ?2-dimensional Space. By W. Palin 
Elderton 94 
(ii) Note on the Relative Variability of the Sexes in Carabus auratus, L. 
By H. G. Kribs 103 
(iii) Variation in Flower-heads of (T«?'Z^a?-(Zfa aWs^ato. By W. W. Robbins 106 
(iv) The Effect of Errors of Observation upon the Cori'elation Coefficient. 
By J. A. Cobb 109 
(v) On Heredity in Sex. Remarks on Mr Cobb's Note. By Karl 
Pearson, F.R.S 109 
(vi) On the Influence of Double Selection on the Variation and Corre- 
lation of two Characters. By Karl Pearson, F.R.S. . .111 
(vii) On certain Points concerning the Probable Error of the Standard 
Deviation. By Raymond Pearl, Ph.D 112 
(viii) Addendum to Memoir: "Split- Hand and Split-Foot Deformities." 
By Thomas Lewis, M.D 117 
(ix) On a Formula for Determining r(,*'-f 1). Editorial . . . 118 
(x) On the Inheritance of the Sex-Ratio in the Thoroughbred Racehorse. 
By David Heron, M.A 120 
(xi) Note on Inheritance of Brachydactyly. By Thomas Lewis, M.D. . 327 
(xii) Note on Inheritance in Man. By Karl Pearson, F.R.S. . . 327 
(xiii) Fecundity of Swine. By Frank M. Surface, Ph.D. . . . 433 
(xiv) The Frequency Constants of a Variable z=f{x-^, x.^. By RAYMOND 
Pearl, Ph.D 437 
(xv) The Correlation between a Variable and the Deviation of a Dependent 
Variable fiom its Probable Value. By J. Ar thur Harris, Ph.D. 438 
Notices and Bibliography 123, 444 
