CONTENTS. 



Art. I. Physico-Geognostic Sketch of the Island of Oahu, 

 one of the Sandwich group. By Meredith 

 Gairdner, M. D., Medical Resident on the Co- 

 lumbia River, .... Page 1 

 General Sketch of Formations, . . .8 



II. On tlie Number of Comets in the Solar System ; on 

 their Light, whether Reflected or Emitted ; and 

 on the Comet wjiich will pass its Perihelion in 

 November 1835. By M. Arago, . . 15 



1. On the Number of Comets, .... 15 



2. On the Light of Comets ; and on the means of deciding 



whether this light emanates from these bodies them- 

 selves, or is borrowed from the Sun. . . 21 



3. On the Comet which will pass its Perihelion in 'N'ovember 



1835, 31 



III. On the periods of the Deluges of Deucalion, Oxyges, 



and Noah, according to the various calculations of 

 time of diff'erent Nations. By Dr Von Schu- 

 bert, ..... 34 



IV. Note respecting the appHcation of the Compressibi- 



lity of Water to Practical Purposes. By James 

 D. Forbes, Esq. F.R.SS. L. & E., Vice-Pres. Soc. 

 Arts, and Professor of Natural Philosophy in the 

 University of Edinburgh, . . .36 



V. Upon the Egyptian Hieroglyphical Writing. By 



M. Arago, ..... 39 



VI. Remarks on the Garnkirk and Glasgow Railway. 



By Mr George Martin, Edinburgh, . 48 



