CONTENTS. 



On the Phcenotnena of Lunar Eclipses. i?y Mr. M. Smith . 168 



Further Remarks on the Dichotomotts Distribution of Nature: 

 together with a Binary Arrange7nent and Description of the 

 Genus Sedtiin. Bj/ A. H. Haworth, Esq. F.L.S. 8fc. Src. 



172 



Eepl_i/ to Mr. Davies's Critique on Mr. Herapath. Bt/ 

 A Correspondent 179 



On new Compounds of Carbon and Hydrogen, and on certain 

 other Products obtained during the Decomposition of Oil by 

 Heat. By M. Faraday, F.R.S. Cor. Mem. Royal Academy 

 of Sciences of Paris, S^'C 180 



On some Kinds of Fulminating Powder inflammable by Per- 

 cussio7i, and their Use ifi Fire-arms. By P. W. Schmidt, 

 Lieutenant in the Prussian Service 197 



On Oil Gas. By M. Juste Preuss, resident in Paris, for- 

 merly Inspector of Rivers and Forests of the Domaine Ex- 

 traordinaire i7i Germany, and Member of several learned So- 

 cieties 203 



On the Comparative Advantages of Oil and Coal Gas. By 

 Robert Christison, M.D. F.R.S. E., Professor of Medical 

 Jurisprude?ice ; and Edw.Turner, M.D. F.R.S.E., Lecturer 

 on Chemistry, Edinburgh 206 



A short Method of finding the Latitude at Sea by Doidile Alti- 

 tudes and the Time between. By James Burns, B.A. 21 1 



Remarks on the Method p7-oposed by Mr. Bv rns for f7iding the 

 Latitude by Double Altitudes. ByE.'RiDDt.T:, Esq. . 250 



Obse7-vatio7is 07i the Tests for Arse7iic. By Aug. Ludw. 

 Giseke 252 



On the Co7ist7"uction of Simdials ; with a Table for that purpose. 

 By M7: M. Smith 259 



E/Tors in Piazzi's Catalogite of Stars 261 



On Tu/igsfe/i. By F. Wohler 263 



On the Existence of Jodi7ie m Mi7ierals. By M. VAUguELiN 



269 



A Method of Measjmiig an inaccessible Line : with Obse7-va- 

 tio7is on Mr. Newton's Cross for Surveying . . . 272 



Further Thoughts on Mr. Herapath's Demonstratio7i. By 

 T. S. Davies, Esq 273 



Co7-rection in Dr. Ure's Paper 07i the latent Heat of Vapours. 

 By T. Tredgold, Esq 277 



Mc//wir on the Urao {Cca-bo7iate of Soda). By Messrs. Mariano 

 de Rivero a)id J. B. Boussingault 278 



Decas quinta novaruni Plantarum Succulentarum ; Autore 

 A. H. Haworth, Soc. Linn. Lo7id. — Soc.Horticidt. Lond. — 

 necnon Soc. C(es. Nat. Cur. Mosc. Socio, 8^c. &;c. . . . 279 



