Vlll CONTENTS OF VOL. XXIX. — FOURTH SERIES. 



Page 

 Mr. E. J. Stone on Change of Climate due to the Excentricity 



of the Earth's Orbit 538 



Proceedings of the Royal Society : — 



Mr. G. Gore on the Properties of Liquefied Hydrochloric 



Acid Gas 541 



Proceedings of the Geological Society : — 



Dr. Stoliczka on the Character of the Cephalopodous Fauna 



of the South Indian Cretaceous Rocks 550 



Mr. W. Wallace on the Growth of Flos Ferri, or Coral- 



loidal Arragonite 550 



Sir J. F. W. Herschel on some Rhomboidal specimens of 



Ironstone, &c 551 



On an Electrical Machine with a Plate of Sulphur, by M. Richer. 55 1 

 On the Chemical and Mineralogical Characters of the Meteorite 



of Orgueil, by MM. Daubree, Cloez, Pisani, and Des Cloizeaux. 552 

 Note on the Propagation of Electricity through Metallic Va- 

 pours produced by the Voltaic Arc, by A. De la Rive 553 



On the Application of the Electric Light for Lighting under 



Water, by M. Paul Gervais 555 



Index 556 



PLATES. 



I. Illustrative of Dr. Rankine's Papers, on the approximate Graphic 

 Measurement of Elliptic and Trochoidal Arcs, and on Stream- 

 lines. 



II. Illustrative of Mr. J. J. Waterston's Paper on some Electrical Expe- 

 riments and Inductions. 



III. Illustrative of Mr. F. Jenkin's Paper on the Retardation of Electrical 

 Signals on Land Lines, and M. J. Angstrom's on a new Deter- 

 mination of the Lengths of Waves of Light. 



ERRATA. 



Page 248, line 8, for heat read cloud. 



— 252, fig. 2, the line O P, and not I P, should have been produced. 



— 362, last line in Table II., for 15'218 read 15' 18. 



— 363, „ III., for pressed 1 "668 read hard-drawn 0*1399. 



— 365, middle of page, /or 0-9750 read 09742. 



— 366, „ for 0-9632 read 0-9625. 



— 366, bottom of page, for 0'9723 read 0'9716. 



for 0-9605 read 0-9598. 

 for 0-9620 read 0\9616. 



