CONTENTS. V 



Page 

 XXVI. On Harmonic Functions in Two Dimensions. By M. Bocher 575 



XXVII. Studies on Fluorite. (I.) The Fluorescence of Fluorite ; (II.) 

 The Thermo-Luminescence of Fluorite ; (III.) Gaseous and 

 Liquid Inclusions in Fluorspar. By H. W. Morse . . 585 



XXVIII. The Electrostatic Field Surrounding Two Special Columnar 



Elements. By P. W. Bridgman 615 



XXIX. Electrical Discharges. (I.) Sloio Moving Electrical Luminous 

 Effects; (II.) Magnetic Field and Electric Discharges. 

 By J. Trowbridge 627 



XXX. Dispersion in Electric Double Refraction. By H. L. Black- 

 well 645 



XXXI. The Thermal Conductivity of Lead. By F. L. Bishop . . 669 



XXXII. The Longitudinal Vibrations of a Rubbed String. By H. N. 



Davis 691 



XXXIII. The Effects of Inbreeding, C ross- Breeding , and Selection upon 



the Fertility and Variability of Drosophila. By W. E. 

 Castle, F. W. Carpenter, A. H. Clark, S. O. Mast, 

 and W. M. Barrows 729 



XXXIV. The Influence of Frequency upon the Self- Inductance of Coils. 



By J. G. Coffin 787 



XXXV. Records of Meetings 807 



Report of the Council 835 



Biographical Notices 837 



James Munson Barnard 837 



John Bartlett 841 



Officers and Committees for 1906-07 847 



List of the Fellows and Foreign Honorary Members . . . 849 



Statutes and Standing Votes 857 



Rumford Premium 868 



Index 869 



