CONTENTS. 



Page 

 Art. I. Fourth Letter on the Glacier Theory to Profes- 

 sor Jameson. By Professor Foriies, . 1 

 II. On the Salt Steppe south of Orenburg-, and on 

 a remarkable Freezing- Cavern. By B.ode- 

 RICK Impey MuRCHrsox, Esq. Pres. G. S. . 10 

 III. Extracts from a Letter addressed by Sir J. 

 Herschel, Bart., F.G.S.. to Mr Mnrchison, ex- 

 planatory of the Phenomena of the Freezing- 

 Cave of Illetzkaya Zatchita, . .14 

 IV. On some Phenomena observed on Glaciers, and 

 on the internal Temperature of large masses 

 of Ice or Snow, with some remarks on the na- 

 tural Ice-caves whicii occur below tlio limit 

 of perpetual snow. By Sir John Herschel, 

 Bart., F.G.S., &c. . . . .17 



V. Analysis of Cajjorcianite and Phakolite, two new 

 Minerals of the Zeolite Family. By Thomas 

 Anderson, M.D. . . . .21 



VI. M. Doyere's Experiments on the Revivification 

 of animals of the types Tardigrada and Eo- 

 tifera, . . .25 



VII. On the light of the Lampyris Itaiica. By M. 



W. Peters, . . . . .30 



VIII. On Coral Islands and Eeefs, as described by 

 Mr Darwin. By Charles Maclaren, Esq. 

 F.R.S.E. Communicated by the Author, . .33 

 IX. Remarks on the preceding- paper, in a Letter 

 from Charles Darwin, Esq., to Mr Macla- 

 REN, . . . . . .47 



X. Description of an improved Tilting- Apparatus 

 for emptying Waggons at the Termini of Rail- 

 ways, Shipping-Places, &c., as used at the 

 Magheramorne Lime-Works, Ireland. With 

 a Plate. By James Thomson, Esq., F.R.S.E., 

 M.R.I.A., F.R.S.S.A., Civil Engineer, Glas- 

 gow. Communicated by the Royal Scottish 

 Society of Arts, . . . .50 



XI, Description of the Elaps Jamesoni, a New Spe- 

 cies of Seri)ent from Demerara. By Thomas 



