﻿INDEX. 
  

  

  983 
  

  

  Osmosis 
  and 
  osmotic 
  pressure, 
  on, 
  

   247, 
  396. 
  

  

  Paints, 
  on 
  the 
  stability 
  of, 
  725 
  ; 
  on 
  

   the 
  transparency 
  of, 
  729. 
  

  

  Parkinson 
  (J.) 
  on 
  the 
  petrology 
  and 
  

   physiography 
  of 
  W. 
  Liberia, 
  495. 
  

  

  Partial 
  tones 
  of 
  stretched 
  strings 
  of 
  

   variable 
  density, 
  on 
  the, 
  235. 
  

  

  Periodic 
  nongenerating 
  force 
  of 
  high 
  

   frequency, 
  on, 
  616. 
  

  

  Permeameter, 
  on 
  the 
  plug, 
  132. 
  

  

  Pidduck 
  (F. 
  B.) 
  on 
  the 
  genesis 
  oi 
  

   ions 
  by 
  collision 
  of 
  positive 
  and 
  

   negative 
  ions 
  in 
  a 
  gas, 
  280. 
  

  

  Planetary 
  temperatures, 
  on, 
  462. 
  

  

  Point 
  discharge 
  through 
  hydrogen, 
  

   on 
  the 
  changes 
  of 
  pressure 
  which 
  

   accompany, 
  24. 
  

  

  Polarized 
  light, 
  on 
  the 
  emission 
  of, 
  

   by 
  fluorescent 
  gases, 
  184. 
  

  

  Positive 
  rays, 
  on, 
  657, 
  697. 
  

  

  Potassium, 
  on 
  the 
  radioactivity 
  of, 
  

   377. 
  

  

  Pressure-integral 
  as 
  kinetic 
  poten- 
  

   tial, 
  on 
  a, 
  436. 
  

  

  Preston 
  (Dr. 
  S. 
  T.) 
  on 
  physical 
  

   relations 
  affecting 
  matter 
  in 
  

   diverse 
  stages 
  of 
  subdivision, 
  

   315. 
  

  

  Radioactivity, 
  on 
  the, 
  of 
  potassium 
  

   and 
  other 
  alkali 
  metals, 
  377. 
  

  

  Radioelements, 
  on 
  the 
  production 
  of 
  

   helium 
  from 
  the 
  primary, 
  513. 
  

  

  Radiuin, 
  on 
  the, 
  in 
  deep-sea 
  sedi- 
  

   ments, 
  190 
  ; 
  on 
  the 
  volume 
  of 
  the 
  

   emanation 
  from, 
  300 
  ; 
  on 
  the 
  

   spectrum 
  of 
  the 
  emanation 
  from, 
  

   313 
  ; 
  on 
  the 
  amount 
  of 
  emanation 
  

   •of, 
  in 
  the 
  atmosphere, 
  584, 
  622 
  ; 
  

   on 
  the 
  relation 
  between 
  uranium 
  

   and, 
  632 
  ; 
  on 
  the 
  action 
  of 
  the 
  

   -emanation 
  from, 
  upon 
  water, 
  812; 
  

   on 
  the 
  atomic 
  weight 
  of, 
  824. 
  

  

  Radium 
  C, 
  on 
  the 
  secondary 
  y 
  rays 
  

   due 
  to 
  the 
  y 
  rays 
  of, 
  224. 
  

  

  Hayleigh 
  (Lord) 
  on 
  the 
  partial 
  tones 
  

   of 
  stretched 
  strings 
  of 
  variable 
  

   density, 
  235 
  ; 
  on 
  the 
  maintenance 
  

   ■of 
  vibrations 
  by 
  impact 
  of 
  water 
  

   drops, 
  238; 
  on 
  discrimination 
  

   between 
  sounds 
  from 
  directly 
  in 
  

   front 
  and 
  directly 
  behind 
  the 
  

   •observer, 
  240 
  ; 
  on 
  the 
  acousticon, 
  

   •241 
  ; 
  on 
  the 
  pitch 
  of 
  sibilants, 
  

   244 
  ; 
  notes 
  on 
  telephones, 
  244 
  ; 
  

   on 
  reflexion 
  from 
  glass 
  at 
  the 
  

   .polarizing 
  angle, 
  444. 
  

  

  Reflexion 
  from 
  glass 
  at 
  the 
  polariz- 
  

   ing 
  angle, 
  on, 
  444. 
  

  

  Regener 
  (Dr. 
  E.) 
  on 
  the 
  radiation 
  

   from 
  radioactive 
  bodies, 
  352. 
  

  

  Relativity, 
  on 
  the 
  principle 
  of, 
  419, 
  

   423, 
  939. 
  

  

  Resistance 
  of 
  a 
  conductor 
  whose 
  

   breadth 
  suddenly 
  changes, 
  on 
  the, 
  

   734. 
  

  

  Resistances, 
  on 
  the 
  variation 
  of 
  

   manganin, 
  with 
  atmospheric 
  

   humidity, 
  450. 
  

  

  Richardson 
  (Prof. 
  O. 
  W.) 
  on 
  the 
  

   kinetic 
  energy 
  of 
  the 
  negative 
  

   electrons 
  emitted 
  by 
  hot 
  bodies, 
  

   353 
  ; 
  on 
  the 
  specitic 
  charge 
  of 
  the 
  

   ions 
  emitted 
  by 
  hot 
  bodies, 
  740 
  ; 
  

   on 
  the 
  kinetic 
  energy 
  of 
  the 
  ions 
  

   emitted 
  by 
  hot 
  bodies, 
  890. 
  

  

  Rontgen 
  radiations, 
  on 
  homogeneous 
  

   secondary, 
  550. 
  

  

  Royds 
  (T.) 
  on 
  the 
  spectrum 
  of 
  the 
  

   radium 
  emanation, 
  313 
  ; 
  on 
  the 
  

   action 
  of 
  the 
  radium 
  emanation 
  

   upon 
  water, 
  812. 
  

  

  Rutherford 
  (Prof. 
  E.) 
  on 
  the 
  volume 
  

   of 
  the 
  radium 
  emanation, 
  300 
  ; 
  

   on 
  the 
  spectrum 
  of 
  the 
  radium 
  

   emanation, 
  313 
  ; 
  on 
  the 
  action 
  of 
  

   the 
  radium 
  emanation 
  upon 
  water, 
  

   812. 
  

  

  Sadler 
  (C. 
  A.) 
  on 
  homogeneous 
  

   secondary 
  Rontgen 
  radiations, 
  

   550. 
  

  

  Satterly 
  (J.) 
  on 
  the 
  amount 
  of 
  

   radium 
  emanation 
  in 
  the 
  atmo- 
  

   sphere, 
  584. 
  

  

  Saturn, 
  on 
  the 
  rings 
  of, 
  949. 
  

  

  Shunts, 
  on 
  the 
  use 
  of, 
  with 
  measur- 
  

   ing 
  instruments, 
  137. 
  

  

  Sibilants, 
  on 
  the 
  pitch 
  of, 
  244. 
  

  

  Skinner 
  (Prof. 
  C. 
  A.) 
  on 
  the 
  optical 
  

   properties 
  of 
  films 
  of 
  magnetic 
  

   metals, 
  833. 
  

  

  Smith 
  (F. 
  E.) 
  on 
  the 
  variation 
  of 
  

   manganin 
  resistances 
  with 
  atmo- 
  

   spheric 
  humidity, 
  450. 
  

  

  Soddy 
  (F.) 
  on 
  the 
  production 
  of 
  

   helium 
  from 
  the 
  primary 
  radio- 
  

   elements, 
  513; 
  on 
  the 
  relation 
  

   between 
  uranium 
  and 
  radium, 
  

   632. 
  

  

  Sodium 
  spectrum, 
  extension 
  of 
  the 
  

   principal 
  series 
  of 
  the, 
  945. 
  

  

  Sounds, 
  on 
  the 
  discrimination 
  be- 
  

   tween, 
  from 
  in 
  front 
  and 
  behind 
  

   the 
  observer, 
  240. 
  

  

  