CONTENTS 



OF THE 



QUARTERLY JOURNAL, 



No. XL. 



ART. PA GE 



I. On the Lignites. By J. Mac Culloch, M.D., F.R.S., &c. 

 (Communicated by the Author.) 205 



II. Observations on the expressed Oil of the Seeds of Croton 

 Tiglium. By John Frost, F.L.S., M.R.I., &c. (Commu- 

 nicated by the Author.) , 231 



III. Outlines of Geology, being the Substance of a Course of Lec- 

 tures on that Subject, delivered in the Amphitheatre of the 

 Royal Institution of Great Britain. By William Thomas 

 Brande, F.R.S., Professor of Chemistry in the Royal Insti- 

 tution, &c 235 



IV. Experiments on the Action of Water upon Glass, with some 

 Observations on its slow Decomposition. By Mr. T. Grif- 

 fiths. (Communicated by the Author.) . . . 259 



V. Analyses of two Mineral Waters, from Springs in Windsor 

 Great Park. By W. T. Brande, F.R.S., Professor of 

 Chemistry in the Royal Institution . . . 264 



VI. On the Tyrant Shrikes of America. By William Swain- 

 son, Esq., F.R. and L.S. (Communicated by the Author.) 267 



VII. Examination of the Large Achromatic of the Royal Observa- 

 tory at Paris . , . 2S6* 



VIII. Observations on Mr. Fraunhofer's Memoir on the infe- 

 riority of Reflecting Telescopes when compared with Refractors 2SS 



IX. Letter from M. Gav-Lussac to J. F. Daniell, Esq., F.R.S., 

 M.R.I., &c., on the Expansion of Gases by Vapour . . 294 



