CONTENTS OF VOL. V, 



(EIETH SERIES). 



NUMBER XXVIII.--JANUARY 1878. 



Page 

 Dr. O. J. Lodge on a Eorm of Daniell Cell convenient as a 



Standard of Electromotive Force. (Plate I.) 1 



Sir W. Thomson on the Thermoelastic, Thermomagnetic, and 



Pyroelectric Properties of Matter 4 



Prof. J. Le Conte on Binocular Vision 27 



Prof. H. E. Weber on Electromagnetic and Calorimetric Ab- 

 solute Measurements : the Absolute Value of Siemens's Unit 

 of Resistance in Electromagnetic Measure ; the Relation 

 between the Current-work and the Heat-evolution in sta- 

 tionary G-alvanic Currents; and the Absolute Values of 

 some constant Hydroelectromotive Eorces in Electromag- 

 netic Measure 30 



Profs. W. E. Ayrton and J. Perry on Ice as an Electrolyte. 



(Plate II.) '. \ . . 43 



Dr. J. Croll on Le Sage's Theory of Gravitation 45 



MM. E. Eremy and Eeil on the Artificial Production of Co- 

 rundum, Ruby, and various Crystallized Silicates 47 



Mr. E. Eield on a Variety of the Mineral Cronstedite 52 



Prof. Cayley on the Distribution of Electricity on two Sphe- 

 rical Surfaces 54 



Captain Abney on the Destruction of the Undeveloped Pho- 

 tographic Image 61 



Notices respecting New Books : — 



Mr. H. E. Blanford's Report on the Administration of 

 the Meteorological Department of India in 1875-76. 



Report on the Meteorology of India in 1875 63 



Lord Rayleigh's Theory of Sound 66 



Proceedings of the Royal Society : — 



Mr. W. Crookes on Repulsion resulting from Radiation. 

 —Preliminary Note on the Otheoscope 68 



