CONTENTS of N° 298.— Fourth Series. 



X. On the Spectrum of the Bessemer-flame. By W. Marshall 



q^ T ?' ?w C ;; ^ JS1 ™ Science Pterin the Giggleswick Grammar 

 School. (With Two Plates.) * p ™ e g 



XI. On the Experimental Determination of the Eelative Intensities 

 ot hounds ; and on the Measurement of the Powers of various sub- 

 stances to Reflect and to Transmit Sonorous Vibrations. By Alfred 

 M. Mayee, PhJ) Professor of Physics in the Stevens Institute 

 ot Technology, Hoboken, New Jersey, II. S. A 



XII. Note on the History of certain Formulae in Spherical Trigo- 

 nometry. By I. Todhttnter, M.A., E.R.S ,7, ; \ 9 



_ T : ^™ T 0n the Law of Gaseous Pressure. By Robert Moon 

 M.A., Honorary Fellow of Queen's College, Cambridge .' lo< 



XIV. On Manometric Flames. By Dr. Rudolph Koma (of 

 Pans). (With a Plate.) _ v 10 ^ 



XV. On the best Arrangement of Wheatstone's Bridge for mea- 

 suring a given resistance with a given Galvanometer and Battery By 

 Oliver Heaviside, Great Northern Telegraph Company, Newcastle- 

 on-lyne ^ 



XVI. The Chemistry of Sulphuric Acid-manufacture. By H A 



Smith :..:..; 121 



XVII. On Fractional Distillation. By J. Alered Wankltn Cor- 

 responding Member of the Royal Bavarian Academy of Sciences . . 129 



XVIII. Proceedings of Learned Societies : — 

 Royal Society:— Dr. W. Huggins on the Spectrum of the 



Great Nebula m Orion, and on the Motions of some Stars 

 towards or from the Earth; Mr. J. N. Locryer's Researches 

 ni bpectrum Analysis in connexion with the Spectrum of the 



kUn ; 1 OOTAC 



Geological Society .'.'.' .'.'.'.'.'.' i.'! . 148 



XIX. Intelligence and Miscellaneous Articles :— 



On the Invention of the Water Air-pump, by H. Sprengel 153 



Report on the Researches of M. Arn. Thenard concerning the 

 Actions of Electric Discharges upon Gases and Vapours, by 



Edm. Becquerel J -» 54 



On the great Barometric Depression of January, by W.'r! Birt 156 

 On the Thermal Effects of Magnetization, by / Moutier 157 



Encke s Comet ' ' * *' 



°\^ ^ ensit 7 of Sound and Light; by Henry Hudson,* M.D* 

 MHJA 160 



It is requested that all Communications for this Work mav be addressed 



