1^4 Scientific Intelligence. 



Counsellors. — Sir William Forbes, Bart. Dr Turner. 



Dr Home. Sir Thomas M. Brisbane. 



Professor Wallace. Dr Graham. 



Literary Class. — Henry Mackenzie, Esq. President* 

 P. F. Tytler, Esq, Secretary. 

 Counsellors. — Right Hon. the Lord Advocate. Dr Hibbert. 



Sir Henry Jardine. Lord Meadowbank. 



Sir John Hay, Bart. Thomas Kinnear, Esq. 



The following gentlemen were elected Ordinary Members : — 

 George Moir, Esq. Advocate. 

 John Stark, Esq. 

 December 4. — A Notice by Dr Brewster was read respecting the ex- 

 istence of one of the New Fluids in a specimen of Sapphire. See this 

 number, p. 155. 



A Paper communicated by Sir Thomas Makdougall Brisbane, 

 K. C. B. was read, entitled " Observations on the Comet of 1825," made 

 at Paramatta. By Mr James Dunlop. This paper is printed in this 

 Number. 



Captain Basil Hall exhibited and described a Pocket Azimuth and 

 Altitude Circle, recently devised by Captain Kater. 



A Paper on Sternbergite, a New Mineral, by Mr Haidinger, was also 

 read. 



Art. XXIX— .SCIENTIFIC INTELLIGENCE. 



I. NATURAL PHILOSOPHY. 

 ASTRONOMY. 



i. Struve's Observations on the Ring and Satellites of Saturn. — The fine 

 telescope at the observatory of Dorpat, which we have described in a pre- 

 ceding number, has been applied by Professor Struve to the measurement 

 of the ring of Saturn. The following results are suited to the mean dis- 

 tance of the planet. The power was 54. 



External diameter of external ring, - - 40".215 



Internal diameter of external ring, 35 .395 



External do of internal ring, - - 34 .579 



Internal do of do, 26.748 



Equatorial diameter of Saturn, - - - ,18 .045 



Breadth of the external ring, - - - 2 .410 



Breadth of chasm between rings, .408 



Breadth of internal ring, - - - 3 .915 



Distance of ring from Saturn, 4 .352 



Equatorial radius of Saturn, 9 .022 



The mean inclination of the ring to the ecliptic is 28° 5'. 9, the error of 

 which probably does not exceed 6'9. Professor Struve was unable to dis- 



