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 the Number of Comets in the Solar System ; on 

 their Light, whether Reflected or Emitted; and 

 on the Comet which 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 November 



^ 1835, , , . r . . . . 31 



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



and Noah, according to the various calculations of 

 time of different Nations. By Dr Von Schu- 

 bert, . . . .34 



IV. Note respecting the application of the Compressibi- 



lity of Water to Practical Purposes. By James 

 D. Forbes, Esq. F.R.SS. L. & K, 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 



