﻿f)44 
  

  

  INDEX. 
  

  

  Thomson 
  (Sir 
  J. 
  J.) 
  on 
  striations 
  in 
  

   the 
  electric 
  discharge, 
  441 
  ; 
  on 
  

   positive 
  electricity, 
  821 
  ; 
  on 
  a 
  

   metliod 
  of 
  measuring 
  the 
  effective 
  

   magnetic 
  field 
  in 
  the 
  magnetic 
  de- 
  

   flexion 
  of 
  the 
  Oanalstrahlen, 
  844. 
  

  

  Thorium, 
  on 
  the 
  distribution 
  of, 
  in 
  

   the 
  earth's 
  surface 
  materials, 
  140, 
  

   146. 
  

  

  Todd 
  (G. 
  W.) 
  on 
  a 
  method 
  of 
  deter- 
  

   mining 
  the 
  sensibility 
  of 
  a 
  balance, 
  

   132 
  ; 
  on 
  the 
  balance 
  as 
  a 
  sensitive 
  

   barometer, 
  135. 
  

  

  Tolman 
  (R. 
  C.) 
  on 
  the 
  principle 
  of 
  

   relativity 
  and 
  non 
  - 
  Nev^tonian 
  

   mechanics, 
  510. 
  

  

  Ultra-violet 
  absorption 
  of 
  sodium 
  

   vapour, 
  on 
  the, 
  530. 
  

  

  Uranium, 
  on 
  the 
  y 
  rays 
  of, 
  620 
  : 
  on 
  

   the 
  relation 
  between, 
  and 
  radium, 
  

   846. 
  _ 
  

  

  — 
  — 
  disintegration 
  series, 
  on 
  the 
  

   ultimate 
  product 
  of 
  the, 
  816, 
  937. 
  

  

  X, 
  on 
  the 
  effect 
  of 
  temperature 
  

  

  on 
  the 
  rate 
  of 
  production 
  of, 
  207 
  ; 
  

   on 
  the 
  separation 
  of, 
  623 
  ; 
  on 
  the 
  

   rays 
  and 
  product 
  of, 
  858, 
  

  

  (L.) 
  on 
  the 
  influence 
  of 
  

   gravity 
  upon 
  a 
  binary 
  solution, 
  

   228 
  ; 
  on 
  the 
  electric 
  discharge 
  

   through 
  the 
  gases 
  IICI, 
  HBr, 
  and 
  

   HI, 
  465. 
  

  

  Vibration 
  curves 
  of 
  violin 
  G 
  string 
  

   and 
  belly, 
  on 
  the, 
  233. 
  

  

  galvanometer, 
  on 
  a 
  bifilar, 
  168. 
  

  

  Vibrations, 
  on 
  flexural, 
  of 
  thin 
  rods, 
  

   722. 
  

  

  Violin 
  G 
  string 
  and 
  belly, 
  on 
  the 
  

   vibration 
  curves 
  of, 
  233. 
  

  

  Viscosity 
  of 
  water, 
  on 
  the, 
  260. 
  

  

  Walker 
  (J.) 
  on 
  the 
  elliptic 
  polar- 
  

   ization 
  produced 
  by 
  the 
  trans- 
  

   mission 
  of 
  a 
  plane 
  polarized 
  

   stream 
  through 
  a 
  plate 
  of 
  quartz, 
  

   195. 
  

  

  Vegard 
  

  

  Water, 
  on 
  the 
  viscosity 
  of, 
  260. 
  

  

  W^aters 
  (J. 
  W.) 
  on 
  radioactive 
  

   minerals 
  in 
  common 
  rocks, 
  677. 
  

  

  Watts 
  (Dr. 
  W. 
  M 
  ) 
  on 
  the 
  atomic 
  

   weight 
  of 
  radium, 
  411. 
  

  

  Wave-length, 
  on 
  the 
  measurement 
  

   of, 
  for 
  high-frequency 
  electrical 
  

   oscillations, 
  794. 
  

  

  Waves, 
  on 
  the 
  instantaneous 
  pro- 
  

   pagation 
  of 
  disturbance 
  in 
  a 
  dis- 
  

   persive 
  medium 
  exemplified 
  by, 
  

   on 
  water, 
  1 
  ; 
  on 
  the 
  damping 
  of 
  

   mercury, 
  194 
  ; 
  on 
  tlie 
  resistance 
  

   due 
  to 
  obliquely 
  moving, 
  414 
  ; 
  on 
  

   the 
  decay 
  of, 
  in 
  a 
  canal, 
  483. 
  

  

  Wilde 
  (Dr. 
  H.) 
  on 
  the 
  moving 
  

   force 
  of 
  terrestrial 
  and 
  celestial 
  

   bodies 
  in 
  relation 
  to 
  the 
  attraction 
  

   of 
  gravitation, 
  523. 
  

  

  Wilderman 
  (Dr. 
  M.) 
  on 
  the 
  velocity 
  

   of 
  .molecular 
  and 
  chemical 
  re- 
  

   actions 
  in 
  heterogeneous 
  systems, 
  

   538. 
  

  

  Wood 
  (Prof. 
  R, 
  W.) 
  on 
  the 
  selective 
  

   reflexion 
  of 
  monochromatic 
  light 
  

   by 
  mercury 
  vapour, 
  187 
  ; 
  on 
  the 
  

   damping 
  of 
  mercury 
  waves, 
  194; 
  

   on 
  the 
  absorption, 
  fluorescence, 
  

   mflgnetic 
  rotation 
  and 
  anomalous 
  

   dispersion 
  of 
  mercury 
  vapour, 
  

   240 
  ; 
  on 
  the 
  flow 
  of 
  energy 
  in 
  a 
  

   system 
  of 
  interference 
  fringes, 
  

   250; 
  on 
  the 
  ultra-violet 
  absm-p- 
  

   tion, 
  fluorescence, 
  and 
  magnetic 
  

   rotation 
  of 
  sodium 
  vapour, 
  530 
  ; 
  

   on 
  high 
  purity 
  interference 
  pheno- 
  

   mena 
  of 
  chlorate 
  of 
  potash 
  cry- 
  

   stals, 
  535 
  ; 
  on 
  Talbot's 
  fringes 
  and 
  

   the 
  echelon 
  grating, 
  758. 
  

  

  Wright 
  (A.) 
  on 
  an 
  electrical 
  device 
  

   for 
  evaluating 
  formulae 
  and 
  solv- 
  

   ing 
  equations, 
  291, 
  

  

  X-rays, 
  on 
  the 
  transformations 
  of, 
  

   J 
  07, 
  

  

  END 
  OF 
  THE 
  EIGHTEENTH 
  VOLUME. 
  

  

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