838 
INDEX. 
Isothermal  distillation  of  nitrogen 
and  oxygen  and  oH  argon  and  oxy- 
gen, 640. 
Jamieson  (T.  F.)  on  the  glacial 
period  in  Aberdeenshire,  189. 
Jeans  (Prof.  J.  H.)  on  the  constitu- 
tion of  the  atom,  604. 
Johonnott  (Dr.  E.  S.)  on  the  black 
spot  in  thin  liquid  filrns,  746. 
Jukes- Browne  (A..  J.)  on  the  clav- 
with-flints,  423. 
Kelvin  (Lord)  on  deep  sea  ship- 
waves,  1. 
Kerr  effect  in  the  infra-red  spectrum, 
on  the,  41. 
Kleeman  (R.  D.)  on  the  recombina- 
tion of  ions  in  air  and  other  gases, 
466. 
Lambert's  law,  on  fluorescence  and, 
782. 
Lenses,  on  the  focometry  of  concave, 
789. 
Light,  on  the  drawing  of  curves  to 
represent  white,  127. 
Lime,  on  the  electrical  conductivity 
of,  510. 
Liquid  films,  on  the  black  spot  in 
thin,  746. 
Liquids,  on  an  apparatus  for  deter- 
mining the  dielectric  constants  of 
non-conducting,  73. 
Lyle  (Prof.  T.  R.)  on  a  practical 
method  of  harmonic  analysis, 
25. 
McCluug  (R.  K.)  on  the  absorption 
of  a  ravs,  131. 
McCoy  (Prof.  H.  X.)  on  the  relation 
between  the  radioactivity  and 
composition  of  uranium  com- 
pounds, 176. 
Magnesia,  on  the  electrical  conduc- 
tivity of,  514. 
Matley  (Dr.  C.  A.)  on  the  carboni- 
ferous rocks  at  Rush,  422. 
Metallic  oxides,  on  the  electrical 
conductivity  of,  505. 
Metals,  on  the  heating  effects  pro- 
duced by  Rcintgen  ravs  in  different, 
292. 
Microscopic  vision,  on  the  diffraction 
theory  of,  154. 
Minimum  deviation  through  a  prism, 
on,  609. 
Mirrors,  on  the  focometrv  of  convex, 
789. 
Molecular  conductivities,  quantita- 
tive relation  between,  416. 
Mond  (R.  L.)  on  an  improved  type 
of  chronograph,  393. 
Morley  (Prof.  A.)  on  tensile  over- 
strain and  recovery  of  aluminium, 
copper,  and  aluminium-bronze,  380. 
M orris- Airey  (H.)  on  the  resolving 
power  of  spectroscopes,  414. 
Morrow  (J.)  on  the  lateral  vibration 
of  loaded  and  unloaded  bars,  354. 
Morton  (Prof.  W.  B.)  on  the  de- 
flexions caused  by  a  break  in  an 
overhead  wire  carried  on  poles, 
632. 
Needle,  on  the  comparison  of  electric 
fields  by  an  oscillating  electric,  402. 
Nicholson  (J.  W.)  on  the  diffraction 
of  short  waves  by  a  rigid  sphere, 
193  ;  on  the  symmetrical  vibra- 
tions of  conducting  surfaces  of 
revolution,  703. 
Nitrogen,  on  sparking-potentials  in, 
535  ;  on  the  isothermal  distillation 
of,  and  oxygen,  640. 
Oscillation  valves  for  rectifying  high- 
frequency  currents,  on,  659. 
Osmotic  pressures  of  alcoholic  solu- 
tions, on  the,  595. 
Overstrain,  on  tensile,  and  recovery 
of  aluminium,  copper,  and  alumi- 
nium-bronze, 380. 
Owen  (D.)  on  the  comparison  of 
electric  fields  by  an  oscillating 
electric  needle,  402. 
Oxides,  on  the  electrical  conductivity 
of  metallic,  505. 
Oxygen,  on  the  isothermal  distilla- 
tion of  nitrogen  and,  and  of  argon 
and,  640. 
Perry  (Prof.  J.)  on  winding  ropes  in 
mines,  107. 
Phasemeters,  on  the  theory  of,  81. 
Plug,  on  the  inversion-points  for  a 
fluid  passing  through  a  porous,  554. 
Plug  experiment,  on  the,  678. 
Porter  (A.  B.)  on  the  diffraction 
theory  of  microscopic  vision,  154. 
Porter  (Prof.  A.  W.)  on  the  inver- 
sion-points   for    a    fluid 
through  a  porous  plug,  554. 
Potentials,  on  some  ellipsoidal,  568. 
Prism,  on  minimum  deviation  through 
a,  609. 
Quartz,  on  the  electrical  conductivity 
of,  524. 
Radiation,  on  the  constitution  of 
natural,  123 ;  on  the,  from  ordinary 
materials.  206. 
