INDEX. 
531 
Potential Fall, in Flames containing Salt Vapours (Wilson), 499. 
POYNTiNG (.J. H.) and Gray (P. L.). An Experiment in Search of a Directive Action of one Quartz Crystal on another, 
245. 
Probability, Theory of; Errors of Random Selection (Sheppard), 101. 
S. 
Selection, reproductive or Genetic (Pearson, Lee, and Bramley-Moore), 257. 
Sheppard (W. F.). On the Application of the Theory of Error to Cases of Normal Distribution and Normal Correlation. 
101 . 
Stature, reconstruction of, from Bones (Pearson), 169. 
T. 
Thermal Expansion of Crystals, determination of (Tutton), 455. 
TuTTON (A. E.), The Thermal Deformation of the Crystallised Normal Sulphates of Potassium, Rubidium, and Ctesium, 
455. 
V, 
Variation and Correlation of Variations; Test of Existence of Normal Law (Sheppard), 101. 
Variations, racial and individual (Pearson), 169. 
Vortex Atoms and the Periodic Law (Hicks), 3S. 
Vortex, spherical, of Hill —Extension to Poly-ads (Hicks), 33. 
W. 
Whii'taicer (E. T.). On the Connexion of Algebraic Functions with Automoi-phic Functions, 1. 
Wilson (C. T. R.). On the Condensation Nuclei produced in Gases by the Action of Rontgen Rays, Ultra-violet Light, 
anrl other Agents, 403. 
Wilson (Harold A.). On the Electrical Conductivity of Flames containing Salt Vapours, 499. 
EIUIATA. 
P. 123, line 9. For f (A, , y, . . .), read f{a\ /B', y', . . .). 
P. 128. The expression at the end of § 20 should be multiplied by F. 
P. 131, line 8. For read, ‘la'^jn. 
