CONTENTS  of  Nc  283.— Fourth  Series. 
I.  Electrodynamic  Measurements.  By  Professor Wilhelm  Weber. 
— Sixth  Memoir,  relating  specially  to  the  Principle  of  the  Conserva- 
tion of  Energy . pat 
II.  Further  Notes  on  the  Theory  of  the  Tides.     By  the  Rev.  T.  K. 
Abbott,  Trinity  College,  Dublin     
III.  On  the  Mathematical  Theory  of  Atmospheric  Tides.  By  the| 
Rev,  Professor  Challis,  M.A.,  LL.D.,  F.R.S.,  F.R.A.S 
IV.  Description  of  a  new  Anemometer  for  Indicating  and  Registering! 
the  Force  and  Direction  of  the  Wind  at  any  distance  from  the  Vane,  &c. 
the  communication  being  made  by  means  of  Electric  Wires  and  without| 
the  aid  of  Shafting.     Invented  by  J.  E.  H.  Gordon,  late  of  King's  Col- 
lege, London.    (With  a  Plate.) 
V.  On  the  Mechanical  Impossibility  of  the  Descent  of  Glaciers  byl 
their  Weight  only.  By  Henry  Moseley,  Canon  of  Bristol,  F.R.S.,| 
and  Corresponding  Member  of  the  Institute  of  France    
VI.  On  the  Spectroscopic  Observation  of  the  Rotation  of  the  Sun,| 
and  a  new  Reversion-Spectroscope.     By  F.  Zollner 
VII.  On  the  Solutions  of  Three  Problems  in  the  Calculus  of  Varia-I 
tions,  in  reply  to  Mr.  Todhunter.  By  Professor  Challis,  M.A.,  LL.D.,| 
F.R.S.,  F.R.A.S 
VIII.  Proceedings  of  Learned  Societies  : — 
Royal   Society: — Mr.  G.  Gore  on  the  Thermo-electric  Action  I 
of  Metals  and  Liquids     
Geological  Society: — Prof.  P.  M.  Duncan  on  the  persistence! 
of  Caryophyllia   cylindracea,  Reuss,  in  the  Coral-fauna  of  the| 
Deep  Sea ;  Mr.  J.  W.  Hulke  on  an  Ichthyosaurus  from  Kimme- 
ridge  Bay,  Dorset;  and  on  a  Fragment  of  a  Teleosaurian  Snout I 
from  Kimmeridge  Bay,  Dorset 75] 
IX.  Intelligence  and  Miscellaneous  Articles : — 
On  an  Explosion  of  the  Sun,  by  C.  A.  Young 
On  the  Transverse  Vibrations  of  Wires  and  Thin  Plates,  by  M. 
E.  Gripon 
On  a  new  Phenomenon  of  Phosphorescence  produced  by  Frictions 
Electricity,  by  M.  Alvergniat     
.*  It  is  requested  that  all  Communications  for  this  Work  may  be  addresj 
post-paid,  to  the  Care  of  Messrs.  Taylor  and  Francis,  Printing  Office, 
Lion  Court,  Fleet  Street,  London. 
