VI. CONTENTS. 



Page 



VII. On Phosphuretted Hydrogen. By Thomas Graham, Esq. 

 F. R.S.Ed., Lecturer on Chemistry in the Andersonian In- 

 stitution, and V. P. Phil. Soc. Glasgow, - - 88 



VIII. General Remarks on the Coal Formation of the Gh'eat Valley 

 of the Scottish Lowlands. By Major-General Lord 

 Greenock, C. B., LL. D., V. P. R. S. Ed., F. G. S. 1 07 



IX. Chemical Examination of ilce Petroleum of Rangoon. By 

 Robert Christison, M.D., F. R.S.Ed., Professor of Ma^ 

 teria Medica in the University of Edinburgh, &c. - 118 



X. On the Composition of Petroleum of Rangoon, with Remark* 

 on Petroleum and Naphtha in general. By William 

 Gregory, M.D., F. R.S.Ed., Lecturer on Chemistry, 

 Edinburgh, &c. - - - - - 124 



XL On the Refraction and Polarization of Heat. By James D. 

 Forbes, Esq. F.R.SS.L. & E., Professor of Natural Philo- 

 sophy in the University of Edinburgh, - - 131 



XII. On the F resh -water Limestone of Bur diehouse in the Neigh- 

 bourhood, of Edinburgh, belonging to the Carboniferous 

 Group of Rocks. With Supplementally Notes on other 

 Fresh-water Limestones. By Samuel Hibbert, M.D., 

 F. R.S.Ed., &c. kc. - - - - - 1G9 



XIII. Analysis of Coprolites and other Organic Remains imbedded 



in the Limestone of Burdiehouse, near Edinburgh. By 

 Arthur Connell, Esq. F. R. S. Ed. - 283 



XIV. On Water as a Constituent of Salts. 1. In the case of Sul- 



phates. By Thomas Graham, F. R. S. Ed., V.-Pres. of 

 of the Phil. Soc. of Glasgow, &c. - - - 297 



