CONTENTS OF VOL. XIII. — FOURTH SERIES. V 



Page 



On the Telescopic Stereoscope, by Mr. J. Elliot 218 



On Induction, by A. Masson • ■ ■ ■; ■• 219 



Observations on the Zodiacal Light and on Shooting Stars, by 



Prof. Helss :,' V ' -ii "-"^ ^^'^^ 



On the Influence exercised on the Magnetic Needle by Musical ^ 



Strings in a state of Resonance, by Dr. H. Reinsch 222 



On Electrical Heat, by P. Riess ■ • ' " ; ' ^"^^ 



On the Spirality of Motion in Whirlwinds and Tornadoes, by 



W. C. Redfieid 223 



NUMBER LXXXVI.— APRIL. 



Prof. Faraday on the Conservation of Force 223 



Mr. T. S. Hunt on the Chemical Composition of the Waters of ^ 



the St. Lawrence and Ottawa Rivers 239 



Mr A Cayley on a Problem in the Partition of Numbers 243 



Prof. Schonbein on the Connexion of Catalytic Phsenomena with 



AUotropy • • -^ ^ J^ 



Prof. Riess on Electric Pauses • -"^ 



The Rev. G. Salmon on tlie Problem of the In-and-circum- 



scribed Triangle •'•.•••■, ; oco 



Dr. Atkinson's Chemical Notices from Foreign Journals .... ibJ 



Proceedings of the Royal Society -^J^> 



Geological Society ^"'-^ 



Researches on the Electricity of the Air and the Earth, and on 

 the Chemical Effects produced bv slow Actions, with or with- 

 out the concourse of Electrical Forces, by M. Becquerel . . 296 



Twinkling of the Stars / •;;' d' i"* ' V ' SSI 



Note on the Density and the Mass of Comets, by M. Babinet. 301 

 On an Apparatus to determine the Solubility of Salts at High 

 Temperatures, by Chev. Ch. von Hauer 304 



NUMBER LXXXVII.-MAY. 



Dr. Hirst on Equally Attracting Bodies. (With a Plate.) . . . . 305 

 Mr J N Ilearder on a new Instrument for Registering a rapid 

 succession of Electrical Discharges, and a comparison of the 

 Eflfects of the Induction Coil with those of Frictional and 



Hydro-electric Machines • ■ ^24 



The Rev. G. Salmon on the Problem of the In-and-circum- 



scribed Polygon • • • ■ • • ''j^' 



Mr A. li. Northcotc on the Clonstitution ot Alloiihane ...... .i.iH 



Prof Miller on the Application of Elementary Geometry to Cry- 

 stallography . "^ 



