CONTENTS. 



Art. I. Biographical Memoir of Dr Thomas Young. By M . 



Arago, Page 213 



IL On the Powers and Use of Kater's Altitude and Azi- 

 muth Circle. By Mr W. Galbraith, . 241 



III. Remarks on the Arrangement of the Natural Bota- 

 nical Families. By Sir Edward Ffrench Brom- 

 HEAD, Bart. F. R. S. Lond. and Edin. Communi- 

 cated by the Author, . . . 245 



Sketch of an Arrangement of the Botanical Families in 

 Natural Groups, Alliances, and Races, . 251 



IV. Abstract of the Memoirs of John Napier of Merchis- 

 ton. By M. Biot. With Notes by the Transla- 

 tor, ...... 255 



V. On the Quadrupeds and Birds inhabiting the County 

 of Sutherland, observed there during an Excursion 

 in the Summer of 1834. By P. J. Selby, Esq., 

 F. R. S. E., F. L. S., &c. &c. . . . 286 



VI. Memoir on the Star-Fish of the genus Comatula, de- 



monstrative of the Pentacrinus europaeus being the 

 Young of our Indigenous Species. By John V. 

 Thompson, F. L. S., Dep. Inspector- General of 

 Hospitals. Communicated by Sir James M'Grigor, 

 F. R. S. With a Plate, . . . 295 



VII. On the Chemical Constitution of Gadolinite. By A. 



CoNNELL, Esq. F. R. S. E., &c. Communicated by 

 the Author, . . . . .300 



