874 



INDEX. 



Morse, H. W., Studies on Fluorite : 

 (I) The Fluorescence of Fluor- 

 ite ; (II) The Thermo-Lumines- 

 cense of Fluorite ; (III) Gaseous 

 and Liquid Inclusions in Fluor- 

 spar, 585-613, 809. 



Munroe, C. E., accepts Fellowship, 

 807. 



Museum of Comparative Zoology at 

 Harvard College. See Zoological 

 Laboratory, 



Myriapods, The Spermatogenesis of 

 the, 329-344. 



Officers, elected, 830 ; List of, 847. 



Orthogonal Functions of x and y, 

 On the Conditions to be Satisfied 

 if the Sums of the Corresponding 

 Members of two Pairs of, are to 

 be themselves Orthogonal, 821. 



Ostwald, Wilhelm, elected Foreign 

 Honorary Member, 808 ; accepts 

 Membership, 822 ; The Interna- 

 tional Language, Esperanto, 810. 



Peirce, B. O., On a Simple Device 

 for measuring the Deflections of 

 a Mirror Galvanometer, 822; On 

 the Correction for the Effect of 

 the Counter Electromotive Force 

 of a Moving-coil Galvanometer 

 used Ballistically, 821; On the 

 Conditions to be satisfied if the 

 Sums of the Corresponding Mem- 

 bers of two Pairs of Orthogonal 

 Functions of x and y are to be 

 themselves Orthogonal, 821 ; On 

 the Length of the Time of Con- 

 tact in the Case of a Quick Tap 

 on a Telegraph Key, 818; On 

 the Manner of Growth of a Cur- 

 rent in the Coil of a Nearly 

 closed Electromagnet as influ- 

 enced by the Width of the 

 Air Gap, 503-540, 809; On the 

 Permeability and the Retentive- 

 ness of a Mass of Fine Iron 

 Particles, 818. 



Peirce, J. M., death of, 822. 



Petroleum, On the Composition of, 

 87-113. 



Physical Laboratory of the Massachu- 

 setts Institute of Technology, 

 Contributions from, 455. 



Pickering, W. H., Comparison of 

 Lunar and Hawaiian Craters, 818. 



Pitch, Variation in Reverberation 

 with Variation in, 821. 



Plane, On a Postulate respecting a 

 Certain Form of Deviation from 

 the Straight Line in a, 351-357, 

 310. 



Plane, On the Inconsistency of the 

 Axiom of the, with the Supposi- 

 tion that the Sum of the Angles 

 of the Rectilinear Triangle is 

 less than 180°, 813. 



Plato's Republic, Studies in the Text 

 of, 832. 



Polarization, Galvanic, on a Mercury 

 Cathode, 397-415. 



Porzild, M. P., Letter from, 819. 



Postulate respecting a Certain Form 

 of Deviation from the Straight 

 Line in a Plane, On a, 351-357, 

 810. 



Publication, Appropriation for, 830. 



Publication Committee, 832 ; Report 

 of, 826. 



Publication Fund, 824. 



Pupin, Michael Idvorsky, elected As- 

 sociate Fellow, 808; accepts Fel- 

 lowship, 810. 



Quayle, W. O. See Mabery, C. F. 



Records of Meetings, 807. 



Refraction, Dispersion in Electric 

 Double, 645-668. 



Reverberation, Variation in, with 

 Variation in Pitch, 821. 



Richards, T. W., and Jackson, F. G., 

 A New Method of Standardizing 

 Thermometers below 0° C, 449- 

 454, 812. 



Richards, T. W., and Mark, K. L., 

 Thermal Expansion of Hydrogen 

 and Carbon Dioxide under Con- 

 stant Pressure, 115-140. 



Richards, T. W., and Wells, R. C, 

 The Transition Temperature of 

 Sodic Bromide : a New Fixed 

 Point in Thermometry, 433-448, 

 812. 



Richards, T. W., Henderson, L. J., 

 and Forbes, G. S., The Elimina- 

 tion of Thermometric Lag and 

 Accidental Loss of Heat in Ca- 

 lorimetry, 1-19. 1. Two New 

 Methods of Avoiding Error in 

 Calorimetry. By T. W. Rich- 



