IV  CONTENTS  OF   VOL.  XLIII.— FOURTH  SERIES. 
Page 
Prof.  W.  Weber's  Electrodynamic  Measurements    119 
Notices  respecting  New  Books  : — 
Mr.  J.  C.  Maxwell's  Theory  of  Heat    149 
Mr.  C.  L.  Prince's  Observations  upon  the  Climate  of  Uck- 
field  in  the  Weald  of  Sussex :  . .  . .    151 
Proceedings  of  the  Royal  Society : — 
Prof.  Hornstein  on  a  Periodic  Change  of  the  Elements  of 
the  Force  of  Terrestrial  Magnetism 151 
The  Astronomer  Royal's   Corrections  to  the  Computed 
Lengths  of  Waves  of  Light  published  in  the  Philosophical 
Transactions  of  the  year  1868 152 
Mr.  J.  E.  Stone's  Experimental  Determination  of  the  Ve- 
locity of  Sound 153 
Proceedings  of  the  Geological  Society : — 
Mr.  W.  Carruthers  on  some  supposed  Vegetable  Fossils  . .  154 
Mr.  A.  H.  Green  on  the  Geology  of  part  of  Donegal  ....  154 
Mr.  T.  Login  on  the  most  recent  Geological  Changes  of 
the  Rivers  and  Plains  of  Northern  India 155 
On  the  Spectrum  of  Hydrogen  at  Low  Pressure,  by  G.  M. 
Seabroke,  Esq 155 
On  the  Disengagement  of  Heat  when  Caoutchouc  is  stretched, 
by  Professor  E.  Villari   157 
On  Actual  Energy,  by  W.  J.  Macquorn  Rankine,  LL.D.,  F.R.S. 
L.  &  E 160 
NUMBER  CCLXXXV.— MARCH. 
Prof.  M.  B.  Pell  on  the  Constitution  of  Matter   161 
Mr.  G.K.Winter  on  Testing  the  Metal-resistance  of  Telegraph- 
wires  or  Cables  influenced  by  Earth-currents.  (With  a  Plate.)   186 
Mr.  G.  K.  Winter's  Observations  on  the  Corona  seen  during  the 
Eclipse  of  December  11th  and  12th,  1871.    (With  a  Plate.)  191 
Mr.  J.  W.  L.  Glaisher's  Remarks  on  certain  portions  of  La- 
place's Proof  of  the  Method  of  Least  Squares      194 
Mr.  R.  Moon  on  Resonance,  and  on  the  Circumstances  under 
which  Change  of  Phase  accompanies  Reflection 201 
Mr.  C.  Tomlinson  on  the  Action  of  Nuclei  in  separating  Gas  or 
Vapour  from  its  Supersaturated  Solution 205 
Mr.  D.  Vaughan  on  the  Origin  of  Malaria , 209 
M.  E.  Edlund's  Researches  on  the  Electromotive  Force  in  the 
Contact  of  Metals,  and  on  the  Modification  of  that  Force 
by  Heat 213 
Notices  respecting  New  Books  : — 
Mr.  I.  Todhunter's  Researches  on  the  Calculus  of  Variations  224 
Mr.  C.  W.  Merritield's  Technical  Arithmetic  and  Mensura- 
tion     226 
