﻿548 
  

  

  INDEX. 
  

  

  Telescopes, 
  on 
  diffraction 
  phenomena 
  

   in 
  the 
  focal 
  plane 
  of, 
  with 
  circular 
  

   aperture, 
  1 
  ; 
  on 
  diffraction-, 
  511. 
  

   Tern 
  pei 
  a 
  tu 
  re, 
  on 
  a 
  numerical 
  equa- 
  

   tion 
  of 
  the 
  absolute 
  scale 
  of, 
  303; 
  

   on 
  the, 
  of 
  Europe, 
  459. 
  

  

  compensation 
  of 
  standard 
  cells, 
  

  

  on 
  appaiatus 
  for 
  self-acting, 
  274. 
  

  

  Thermometer, 
  on 
  Lord 
  Kelvin's 
  abso- 
  

   lute 
  method 
  of 
  graduating 
  a, 
  227. 
  

  

  Thermometry, 
  notes 
  on, 
  205, 
  299. 
  

  

  Thomson 
  (Prof. 
  J. 
  J.) 
  on 
  the 
  con- 
  

   nexion 
  between 
  cathode 
  and 
  Ront- 
  

   gen 
  rays, 
  172. 
  

  

  Thomson 
  effect 
  in 
  a 
  binary 
  electrolyte, 
  

   on 
  the, 
  529. 
  

  

  Torsional 
  angle 
  of 
  a 
  rotating 
  shaft 
  or 
  

   spiral 
  spring, 
  on 
  a 
  new 
  method 
  of 
  

   measuring 
  the, 
  183. 
  

  

  Townsend 
  (J. 
  S.) 
  on 
  the 
  electrical 
  

   properties 
  of 
  newly 
  prepared 
  gases, 
  

   125 
  ; 
  applications 
  of 
  diffusion 
  to 
  

   conducting 
  gases, 
  469. 
  

  

  Trowbridge 
  (Prof. 
  J.) 
  on 
  high 
  electro- 
  

   motive 
  force, 
  98 
  ; 
  on 
  phosphores- 
  

   cence 
  produced 
  by 
  electrification, 
  

   100 
  ; 
  on 
  the 
  source 
  of 
  the 
  .r-ravs, 
  

   185. 
  

  

  Twyman 
  (F.) 
  on 
  variations 
  in 
  the 
  

   electromotive 
  force 
  of 
  the 
  H-form 
  

   of 
  Clark 
  cells 
  with 
  temperature, 
  

   285. 
  

  

  Ultra-violet 
  light, 
  on 
  air 
  electrified 
  

   by 
  the 
  discharging 
  action 
  of, 
  272. 
  

  

  Uranium, 
  on 
  electric 
  equilibrium 
  be- 
  

   tween, 
  and 
  an 
  insulated 
  metal 
  in 
  

   its 
  neighbourhood, 
  277. 
  

  

  Vincent 
  ( 
  J. 
  H.) 
  on 
  the 
  photography 
  

   of 
  ripples, 
  191. 
  

  

  Vision, 
  on 
  microscopic, 
  480. 
  

  

  Volta 
  electricity 
  of 
  metals, 
  on, 
  398. 
  

  

  Water, 
  on 
  the 
  freezing- 
  and 
  boiling- 
  

   points 
  of, 
  £00. 
  

  

  Waters 
  (W. 
  L.) 
  on 
  variations 
  in 
  the 
  

   electromotive 
  force 
  of 
  the 
  H-form 
  

   of 
  Clark 
  cells 
  with 
  temperature, 
  

   285. 
  

  

  Wave-motion 
  along 
  a 
  periodically 
  

   leaded 
  string, 
  on 
  the 
  propagation 
  

   of, 
  356. 
  

  

  Wave-resistance 
  of 
  a 
  ship, 
  on 
  the, 
  

   106. 
  

  

  Wildermann 
  (Dr. 
  M.) 
  on 
  real 
  and 
  

   apparent 
  freezing-points 
  and 
  the 
  

   freezing-point 
  methods, 
  204. 
  

  

  Wills 
  (A. 
  P.) 
  on 
  the 
  susceptibility 
  of 
  

   diamagnetic 
  and 
  weakly 
  magnetic 
  

   substances, 
  432. 
  

  

  Wilson 
  (H. 
  A.) 
  on 
  the 
  influence 
  of 
  

   dissolved 
  substances 
  and 
  of 
  electri- 
  

   fication 
  on 
  the 
  re-formation 
  of 
  

   clouds, 
  454. 
  

  

  Wires, 
  on 
  the 
  failure 
  of 
  german- 
  

   silver 
  and 
  platinoid, 
  157. 
  

  

  Wood 
  (R. 
  W.) 
  on 
  phase-reversal 
  

   zone-plates, 
  and 
  diffraction-tele- 
  

   scopes, 
  511. 
  

  

  Wright 
  (L.) 
  on 
  microscopic 
  images 
  

  

  and 
  vision, 
  480. 
  

   .r-rays, 
  on 
  the 
  source 
  of 
  the, 
  1 
  85 
  ; 
  on 
  

   the 
  existence 
  of 
  the, 
  in 
  the 
  cathodic 
  

   beam, 
  503. 
  

   Zeeman 
  (Dr. 
  P.) 
  on 
  measurements 
  

   concerning 
  radiation 
  phenomena 
  in 
  

   the 
  magnetic 
  field, 
  197. 
  

   Zeleny 
  (Prof. 
  J.) 
  on 
  air 
  electrified 
  by 
  

   the 
  discharging 
  action 
  of 
  ultra- 
  

   violet 
  light, 
  272. 
  

   Zone-plates, 
  on 
  phase-reversal, 
  511. 
  

  

  ExND 
  OF 
  THE 
  FORTY-FIFTH 
  VOLUME. 
  

  

  Printed 
  by 
  Taylor 
  and 
  Francis, 
  Eed 
  Lion 
  Court, 
  Fleet 
  Street. 
  

  

  