346 
GENERAL INDEX. 
free paths, the relations between, Prof. 
J. D. Everett on, 1889, 498 
Ray gill fissure, Yorkshire, report on the 
exploration of, 1881, 645 ; 1883, 133 ; 
1884 , 24051886,469 
Rayleigh (Lord) [for communications 
before 1873, see Strutt (Hon. J. W.)] 
f-on a natural limit to the sharpness 
of the spectral lines, 1873, 39 
t- on the forces experienced by a 
lamina immersed obliquely in a fluid 
stream, 1876, 31 
*-on the lower limit of the prismatic 
spectrum, 1877, 32 
- o)i the progress of the chief branches 
of mathematics and physics, 1879, 37 
- on the present state of our knowledge 
of spectrum analysis, 1880, 258 ; 1881, 
317 ; 1882,120; 1884, 295 
-note on the theory of the induction 
balance, 1880, 472 
- on standards for use in electrical 
measurements, 1881, 423 ; 1882, 70 ; 
1883, 41 ; 1884, 29 ; 1885, 31 ; 1886, 
145 ; 1887, 206 ; 1888, 55 ; 1889, 41 ; 
1890, 95 
-fsome colour experiments, 1881, 526 ; 
on a question in the theory of lighting, 
ib. 
—— on fixing a standard of white light, 
1882, 38 ; 1883, 127 ; 1885, 61 ; 1886, 
39 ; 1887, 47 
- Address to the Mathematical and 
Physical Section, 1882, 437 ; on the 
tension of mercury vapours at common 
temperature, 441 ; on the absolute 
measurement of electric currents, 445 ; 
on the duration of free electric currents 
in an infinite conducting cylinder, 446 ; 
ton the equilibrium of liquid-conduct¬ 
ing surfaces charged with electricity, 
447 ; ton an instrument for measuring 
the intensity of aerial vibration, 477 ; 
*011 the effect of wind on the draught 
of chimneys, ib. 
-suggestions for facilitating the use 
of a delicate balance, 1883, 401 ; on 
the imperfection of the galvanometer 
as a test of the evanescence of a tran¬ 
sient current, 444 
- Presidential Address at Montreal, 
1884, 3 
-a lecture experiment on induction, 
1884, 632 ; on telephoning through a 
cable, ib. ; on a galvanometer with 
twenty wires, 633 ; *on the colours of 
thin plates, 651 ; on Clark’s standard 
cells, ib. 
. -tthermodynamic efficiency of ther¬ 
mopiles, 1885, 898 ; a theorem relating 
to the time-moduli of dissipative 
systems, 911 ; fon an improved appa¬ 
ratus for Christiansen’s experiment, 
930 ; toptical comparison of methods 
for observing small rotations, ib. ; fon 
the accuracy of focus necessary for 
sensibly perfect definition, ib. 
Rayleigh (Lord) on electrolysis in its 
physical and chemical bearings, 1886, 
308 ; 1887 , 336 ; 1888 , 339 ; 1889 , 223 ; 
1890, 138 
-*on the physical and physiological 
theories of colour-vision, 1886, 526 ; *on 
the intensity of reflection from glass and 
other surfaces, 527 ; *on an experiment 
showing that a divided electric current 
may be greater in both branches than 
in the mains, ib. 
-on the existence of reflection when 
the relative refractive index is unity, 
1887, 585 
- is the velocity of light in an elec¬ 
trolytic liquid influenced by an electric 
current in the direction of propagation? 
1888,341 
--- discussion on lightning conductors, 
1888, 602 , 611 
- on the possibility of calculating tables 
of certain mathematical functions, 1889, 
28 
-on the tones of bells, 1889, 491 ; on 
pin-hole photography, 493 ; *on the 
extensibility of liquid films, 502 
-on defective colour vision, 1890, 728 ; 
on the tension of water surfaces, clean 
and contaminated, investigated by the 
method of ripples, 746 ; instantaneous 
photographs of -water jets, 752 
Rayleigh’s (Lord) solution for waves in a 
plane vortex stratum, a disturbing in¬ 
finity in, Prof. Sir W. Thomson on, 
1880, 492 
Rays, curved, orbits, and catenaries, Prof. 
J. D. Everett on the relations between, 
1888, 581 
-inclined, Prof. J. Thomson on atmo¬ 
spheric refraction of, and on the path 
of a level ray, 1872, 41 
- spectral. Dr. C. K. Akin on the trans¬ 
mutation of, 1863, 93 
* - ultra-violet, Prof. Croullebois on 
the action of quartz on, 1872, 36 
Reaction time, an instrument for measur¬ 
ing, F. Galton on, 1889, 784 
Read (A. A.) and Dr. G. H. Bailey, the 
behaviour of the more stable oxides at 
high temperature, 1890, 773 
* -(C. S.) on the recent improvements 
in Norfolk farming, 1868, 177 
Reade (Rev. J. B.) on photography with 
colour, 1862, 22 
-(T. M.) on the circulation of under¬ 
ground waters, 1875, 114 ; 1S76, 95 ; 
1877, 56 ; 1878, 382 ; 1879 ,155 ; 1880, 87 
- on the South-Lancashire wells , 1877, 
66 
-(W. W.) on a journey to the upper 
waters of the Niger, 1870, 175 
