viil CONTENTS OF VOL. XVII. — FOURTH SERIES. 



Page 

 Prof. Dove on the Application of the Stereoscope to distinguish 



Prints from Reprints, or generally Originals from Copies . . 415 

 Prof. Tyndall on Vibrations produced by an Electric Current. . 417 

 Prof. Rijke on a New Method of causing a Vibration of the Air 



contained in a Tube open at both ends 419 



Dr. Atkinson's Chemical Notices from Foreign Journals 422 



Notices respecting New Books : — Prof. Boole's Treatise on 



Differential Equations 430 



Proceedings of the Royal Society : — 



Mr. J. P. Gassiot on the Stratifications in Electrical Dis- 

 charges, as observed in Torricellian and other Vacua. . 432 



Dr. Andrews and Mr. P. G. Tait on Ozone 435 



Dr. Walker on Ice Observations 437 



Dr. Smith on the Phaenomena of Respiration 439 



M. Wartraann on the Effect of Pressure on Electric Con- 



ductibility in Metallic Wires 441 



Proceedings of the Geological Society : — 



Dr. Falconer on the Ossiferous Cave called ' Grotta di 



Maccagnone,' near Palermo 442 



Baron De Zigno on the Jurassic Flora 443 



Prof. Buckman on a group of supposed Reptilian Eggs 



from the Great Oolite of Cirencester 444 



Prof. Phillips on some Sections of the Strata near Oxford. 444 

 Sir P. Egerton on the Nomenclature of the Fishes of the 



Old Red Sandstone 445 



Dr. Anderson on the Yellow Sandstone of Dura Den and 



its Fossil Fishes 446 



Note on the Stratification of the Electric Light, by MM. Quet 



and Seguin 447 



Analysis of a Native Sulphate of Copper and Iron, by M. F. 



Pisani 449 



On Prof. C. P. Smyth's TenerifFe Meteorological Observations, 



by S. M. Drach 450 



Index 45 1 



PLATES. 



I. Illustrative of Mr. J. Park Harrison's Paper on Lunar Influence on 

 Temperature as conuected with Serenity of the Sky. 



II. llkistrative of Mr. G. Gore's Paper on an Apparatus for examining 

 the Electrical relations of unequally heated Mercury and Fluid 

 Alloys in conducting Liquids. 



