iv CONTENTS. 



Page 



Description of a cheap and portable Instrument for enabling 

 Young People to acquire a knowledge of the Stars, or deter- 

 mine their situation in the Heavens. By S. Lee, Esq. . 371 



Carus's Introduction to the Comparative Anatomy of Animals, 



reviewed ^T^ 



Comparative Value of the principal Varieties of Fuel, <^c., by 



Marcus Bull, reviewed ib' 



Dani ell's Meteorological Essays and Observations, reviewed . ib. 



Philosophical Transactions of the Royal Society for 1827, re- 

 viewed , , ib. 



Practical Treatise on the use of the Blowpipe, by J. Griffin, re- 

 viewed ib. 



Circle of the Seasons, and Practical Key to the Calendar and 



Almanack, reviewed ... . , . . , ib. 



Conversations on the Animal Economy — ^reviewed . . . ib. 



Notice of a New Genus of Plants discovered in the Rocky Moun- 

 tains of North America by Mr. David Douglas. By John 

 LiNDLEY, Esq 383 



A Description of the Aurora Borealis seen in London on the 

 Evening and Night of the 25th bf September, 1827, with Cri- 

 tical Remarks, &c. By E. A. Kendall, Esq., F.S. A. . 385 



Proceedings of the Royal Society 424 



Proceedings of the Horticultural Society 425 



Astronomical and Nautical Collections 



i. Ephemeris of the periodical Comet for its Return in 1828, 

 computed with the consideration of a resisting Medium. 

 By Professor Encke . ' 428 



ii. Elementary View of the undulatory Theory of Light. By 



Mr. Fresnell 431 



iii. Remarks on the action of Corpuscular Forces. In a let- 

 ter to Mr. PoissoN , 448 



iv. Calculations of Lunar Phenomena. By Thomas Hen- 

 derson, Esq. 450 



