INDEX. 



'51 



Lindemann (Prof. F. A.) on the 

 vapour pressure and affinity of iso- 

 topes, 173; on magnetic storms, 669. 



Lodge (SirO.) on light and gravita- 

 tion, 7-37. 



Loeb (Dr. L. B.) on the recoil of alpha 

 particles from light atoms, 533. 



Lorentz-Einstein transformation, on 

 the derivation of the, 349. 



Lubricating properties of certain 

 substances, on the, 32. 



Machinery, on critical speeds of, 395. 



McLeod (A. R.) on terrestrial re- 

 fraction, 546 ; on a new form of 

 catenary, 661. 



Magnet testing instrument, on a new, 

 542. 



Magnetic effects of vibration in iron 

 rods, on the, 528. 



field constants, on, 201. 



storms, on the theory of, 669. 



Material stresses, on the equations 

 for, 235. 



Merton (Dr. T. R.) on an experiuient 

 relating to atomic orientation, 463. 



Mefals, ignition of gases by hot, 613. 



Mitra (S. K.) on the large-angle 

 diffraction by apertures with 

 curvilinear boundaries, 289. 



Molecular theory of refraction, re- 

 flexion, and extinction, on the, 269. 



of solution, on the, 696. 



Mukerjee (A. T.) on a method of 

 measuring the capacity of gold- 

 leaf electroscopes, 245. 



Natanson (Prof. L.) on the molecular 

 theory of refraction, reflexion, and 

 extinction, 269. 



Nitrogen, on the rate of solution of, 

 by water, 317; on the coefficient 

 of viscosity of, 582. 



Oblique refraction, on proofs of 

 elementary theorems of, 480. 



Oim, on the value of the silver, 601. 



Owen (S. P.) on a vapour pressure 

 equation, 655. 



Oxygen, on the rate of solution of, 

 by water, 317 ; on the coefficient 

 of viscosity of, 582. 



Partial tones of bowed stringed in- 

 struments, on the, 573. 



Pascoe (Lieut. E. H.) on the early 

 history of the Indus, Brahmaputra, 

 and Ganges, 667. 



Periodic precipitates, on, 738. 



Photographic rendering of contrast, 

 on the, 187, 633, 637. 



Planimeter, on the slip-curves of an 

 Amsler, 489. 



Plummer (Prof. H. C.) on the form 

 of the trailing aerial, 732. 



van der Pol (Dr. B.) on the pro- 

 duction and measurement of short 

 continuous electromagnetic waves, 

 90; oti a method of measuring 

 without electrodes the conduc- 

 tivity at various points along a 

 glow discharge and in flames, 

 352 ; on the propagation of 

 electromagnetic waves round the 

 earth, 365. 



Porter (Prof. A. W.) on the law for 

 the true photographic rendering 

 of contrast, 187, 637. 



Positive ray spectrograph, on a, 

 707. 



Potassium, on the optical properties 

 of films of, 98. 



Potentials of elliptic cvlinders, on 

 the, 465. 



Precipitates, on periodic, 738. 



Probability, on approximations in 

 the theory of, 231 ; on some 

 aspects of the theory of, 715. 



Radium and uranium, on the relation 

 between, 483. 



Raman (Prof. C. V.) on the scattering 

 of light in the refractive media of 

 the eye, 568 ; on the partial tones 

 of bowed instruments, 573. 



Rankine (Dr. A. 0.) on the magnetic 

 effects of vibration, 528. 



Rayleigh (Lord) on the travelling- 

 cyclone, 420 ; on periodic precipi- 

 tates, 738. 



, obituary notice of, 427. 



Reflexion, on the molecular theory 

 of, 269. 



Refraction, on the molecular theory 

 of, 269; on proofs of elementary 

 theorems of oblique, 480 ; on 

 terrestrial, 546. 



Refractive media of the eye, on the 

 scattering of light in the, 568. 



Relativity, on the force-function in 

 the theory of, 113. 



Ren wick (F. F.) on the law for the 

 true photographic rendering of 

 contrast, 633. 



Resonance theory of audition, on 

 the. 164. 



Richardson (Lieut.-Col. A. ft.) on 

 stream-line flow from a disturbed 

 area, 433. 



