550 
INDEX. 
Hygrometer,  on  a  new,  514,  538. 
Hyperdistributives,  on,  300. 
Iodine,  on  the  absorption-spectrum  of 
the  chloride  of,  318  ;  on  the  ab- 
sorption-spectrum of  the  vapour 
of  the  protobromide  of,  4/3. 
Jupiter,  on  the  mean  motion  of, 
320. 
Kirkwood  (Prof.  D.)  on  the  mean 
motions  of  Jupiter,  Saturn,  Uranus, 
and  Neptune,  320. 
Lamansky  (S.)  on  the  heat-spectrum 
of  the  sun  and  the  lime-light,  282. 
Light,  on  the  computed  lengths  of 
the  waves  of,  152 ;  on  the  theory 
of  the  aberration  of,  289  ;  on  a  sup- 
posed alteration  of  aberration  of, 
by  passing  through  a  refracting 
medium,  310;  on  an  anomalous 
dispersion  of,  295,  337 ;  on  the  re- 
flection and  refraction  of,  by  in- 
tensely opaque  matter,  321. 
Lightning,  on  the  influence  of  gas- 
and  water-pipes  in  determining  the 
direction  of  a  discharge  of,  115. 
Lime-light,  on  the  heat-sDectrum  of 
the,  282. 
Liquids,  on  the  thermo-electric  action 
of,  54 ;  on  the  passage  of  electri- 
city through,  369,  518. 
Loewy  (B.)  on  some  recent  researches 
in  solar  physics,  and  on  a  law  re- 
gulating the  time  of  duration  of 
the  sun-spot  period,  385. 
Lommel  (E.)  on  coloured  gelatine 
plates  as  objects  for  the  spectro- 
scope, 240. 
M'Farlane  (D.)  on  the  determination 
of  the  surface-conductivity  for  heat 
in  absolute  measure,  392. 
Magnetism,  on  a  periodic  change  of 
the  elements  of  the  force  of  terres- 
trial, 151 ;  on  the  origin  of  the 
earth's,  and  the  magnetic  relations 
of  the  heavenly  bodies,  345,  446, 
481  j  on  the  hydrodynamical  theory 
of,  401. 
Magnets,  on  the  directive  power  of 
large  steel,  472. 
Malaria,  on  the  origin  of,  209. 
Matter,  on  the  constitution  of,  161; 
on  the  abrupt  change  at  boiling  or 
condensing  in  reference  to  the  con- 
tinuity of  the  fluid  state  of,  227. 
Maxwell  (Prof.  J.  C.)  on  the  induc- 
ion  of  electric  currents  in  an  infi- 
nite plane  sheet  of  uniform  con- 
ductivity, 529. 
Mayer  (Prof.  A.  M.),  acoustical  expe- 
riments on  the  translation  of  a  vi- 
brating body,  278. 
Metals,  on  the  thermo-electric  action 
of,  54. 
Meteoric  irons,  on  some,  314. 
Meyer  (O.  E.)  on  anomalous  disper- 
sion of  light,  295,  337. 
Moon,  on  the,  seen  by  the  naked  eye, 
427. 
Moon  (R.)  on  a  simple  case  of  reso- 
nance, 99 ;  on  resonance  and  on  the 
change  of  phase  accompanying  re- 
flection,  201 ;  on  the  mode  in 
which  stringed  instruments  givi 
rise  to  sonorous  undulations,  439. 
Moseley  (Canon)  on  the  mechanical 
impossibility  of  the  descent  of  gla- 
ciers by  their  weight  only,  38. 
Multiple  battery,  on  a  mode  of  mea- 
suring the  internal  resistance  of  a, 
473. 
Neale  (E.  Vansittart)  on  glacier-mo- 
tion, 104. 
Neptune,  on  the  mean  motion  of, 
320. 
Nordenskjold  (Prof.)  on  some  meteo- 
ric irons,  234,  314. 
Nuclei,  on  the  action  of,  in  separating 
gas  or  vapour  from  its  supersatu- 
rated solution,  205. 
Ozone,  anomalous  production  of, 
547. 
Pell  (Prof.  M.  B.)  on  the  constitu- 
tion of  matter,  161. 
Phosphorescence,  on  a  new  pheno- 
menon of,  produced  by  friction al 
electricity,  80. 
Planets,  on  the  spectroscopic  exami- 
nation of  the,  546. 
Plateau  (T.)  on  vapour-vesicles,  316. 
Quincke  (G.)  on  electrolysis,  and  tin 
passage  of  electricity  through 
liquids,  369,  518. 
Rankine  (Prof.  W.  J.  M.)  on  actual 
energy,  160. 
Raynaud  (B.  M.  J.)  on  a  mode  of 
measuring  the  internal  resistance 
of  a  multiple  battery,  473. 
Resonance,  on  a  simple  case  of,  99  \ 
observations  on,  201. 
Riccati's  equation,  on  the  relations 
between  the  particular  integrals  in 
Cayley's  solution  of,  433. 
