*i CONTENTS. 



MARCH, 1809. 



Engravings of the following Objects: 1 . Messrs. Allca and Pepys*s Apparatus 

 for showing the Changes produced in Air by Respiration: 2. View of Port- 

 moon. 



I. A Letter on the Alterations that have taken place in the Structure of Rocks, 

 on the Surface of the basaltic Country in the Counties of Derry and Antrim. 

 Addressed to Humphry Davy, Esq. Sec. R. S. By Wm. Richardson, D. D. 



1G1 



f I. On the Purification of Camphor by Means of Potash. In a Letter from a 

 Correspondent - - -* - - 170 



III. An Account of some Peculiarities in the anatomical Structure of the 

 Wombat By Everard Home, Esq. F. R. S. - - 177 



IV. On the Changes produced in Atmospheric Air, and Oxigen Gas, by Re- 

 spiration. By W. Allen, Esq. F. R. S., and W. H. Pepys, Esq. F. R. S. 180 



V. A Letter on Comets, addressed to Mr. Bode, Astronomer Royal at Berlin. 

 Received from the Author - 206 



VI. An Example of the Utility of a Series in finding a Fluent. By a Corre- 

 spondent ------ 21" 



VII. An Account of the Method of cultivating the American Cranberry, Vac- 

 cinium Macrocarpum, at Spring Grove. By the Right Hon. Sir Joseph 

 Banks, Bart. K. B. P. R. S. &c. - - - 21t> 



VIII. On the Existence of Animal Matter in Mineral Substances. From Par- 

 kinson's Organic Remains - - - - 2 IS 



IX. Observations on the different Species of Dahlia, and the best Method of 

 cultivating them in Great Britain. By R. A. Salisbury, Esq. F. R.S. 224 



X. Some Questions in Ornithology. In a Letter from a Correspondent 233 



XI. On the GoW Mines in the Department of the Isere. By Hericart de Thury, 

 Mine Engineer ----- 934 



Scientific News * 237 



Meteorological Journal * 24* 



APRIL, 



