CONTENTS  of  N°  288.— Fourth  Series. 
LI.  A  new  discussion  of  the  Hydrodynamical  Theory  of  Magnetism. 
By  Professor  Challis,  M.A.,  LL.D.,  F.R.S page 
LII.  On  the  Moon  seen  by  the  naked  Eye.     By  Samuel  Sharpe, 
Esq 
LIII.  An  Examination  of  the  recent  attack  upon  the  Atomic  Theory. 
By  R.  W.  Atkinson,  F.C.S.,  Assistant  in  the  Chemical  Laboratory, 
University  College 
LIV.  On  the  Relations  between  the  particular  Integrals  in  Cayley's 
solution  of  Riccati's  Equation.    By  J.  W.  L.  Glaisher,  B.A.,  F.R.A.S., 
Fellow  of  Trinity  College,  Cambridge A 
LV.  On  the  Mode  in  which  Stringed  Instruments  give  rise  to  So- 
norous  Undulations  in  the   surrounding  Atmosphere.     By  Robert 
Moon,  M.A.,  Honorary  Fellow  of  Queen's  College,  Cambridge  ....    4 
LVI.   On  the  Objections  raised  by  Mr.  Tait  against  my  Treatment 
of  the  Mechanical  Theory  of  Heat.     By  R.  Clausius 4 
LVII.  On  the  Origin  of  the  Earth's  Magnetism,  and  the  Magnetic 
Relations  of  the  Heavenly  Bodies.     By  F.  Zollner 4 
LVIII.  Notices  respecting  New  Books  : — A  Treatise  on  the  Theory 
of  Friction.     By  John  H.  Jellett,  B.D.,  Senior  Fellow  of  Trinity 
College,  Dublin  ;  President  of  the  Royal  Irish  Academy 4 
LIX.  Proceedings  of  Learned  Societies  : — 
Royal  Society  : — The  Astronomer  Royal's  Experiments  on 
the  Directive  Power  of  large  Steel  Magnets,  of  Bars  of  Magnet- 
ized Soft  Iron,  and  of  Galvanic  Coils,  in  their  action  on  external 
small  Magnets ;  M.  B.  M.  Jules  Raynaud  on  a  mode  of 
Measuring  the  Internal  Resistance  of  a  Multiple  Battery  by 
adjusting  the  Galvanometer  to  Zero 472-4 
LX.  Intelligence  and  Miscellaneous  Articles  : — 
On  the  Absorption-spectra  of  the  Vapours  of  Selenium,  Proto- 
chloride  and  Bromide  of  Selenium,  Tellurium,  Protochloride 
and  Protobromide  of  Tellurium,  Protobromide  of  Iodine,  and 
Alizarine,  by  D.  Gernez 4 
Demagnetization  of   Electromagnets,   by  Robert  W.  Willson, 
Junior  Class,  Harv.  Coll 4 
The  Source  of  the  Solar  Heat,  by  Maxwell  Hall,  B.A 4 
A  new  Sensitive  Singing-Flame,  by  W.  E.  Geyer,  of  the  Stevens 
Institute  of  Technology 4! 
On  the  best  Resistance  of  the  Coils  of  any  Differential  Galvano- 
meter, by  Louis  Schwendler,  Esq 4$ 
***  It  is  requested  that  all  Communications  for  this  Work  may  be  addresse 
post-paid,  to  the  Care  of  Messrs.  Taylor  and  Francis,  Printing  Office,  R 
Lion  Court,  F'       Street,  London. 
