i58 Notices respecting New Books. 



W. Somerville, M.D. ; by Sir Henry Bunbury, Bart. — On 

 the Discovery of an almost perfect Skeleton of the Plesiosaurus; 

 by the Rev. W. D. Conybeare. — Notice on the Megalosaurus 

 or great Fossil Lizard of Stonesfield ; by the Rev. W. Buck- 

 land. — On the Geology and Topography of the Island of Su- 

 matra, and some of the adjacent Islands ; by the late William 

 Jack, M.D. — Geological Observations made on a Voyage from 

 Bengal to Siam and Cochin China; by J. Crawford, Esq. — 

 Notes made in the Course of a Voyage from Bombay to 

 Bushire in the Persian Gulf; by J. B. Fraser, Esq. — An Ac- 

 count of some Effects of the late Earthquakes in Chili : ex- 

 tracted from a letter to Henry Warburton, Esq. ; by Mrs. 

 Maria Graham. — Account of some Terraces, or ancient 

 Beaches, in the Isle of Jura ; by Capt. Vetch, R. E. — With 

 various other papers and notices ; the whole illustrated by 

 25 Plates, Maps and Sections, many of them coloui'ed. 



The Second Part of the First Volume of The Memoirs of 

 the Astronomical Society has just been published, and the 

 following are its contents : 



Observations on the Collimation Adjustment of a Transit 

 Instrument ; together with some Arguments in favour of cer- 

 tain Circumpolar Stars being added to our standard Catalogue, 

 to facilitate a rigorous and frequent Examination of the Posi- 

 tion of the Instrument with regard to the Meridian, and of 

 the Altitude of the Pole, relative to the Observer's Station. 

 By James South, Esq. — Tables of the Semidiameter of the 

 Moon in Time, &c. By William Lambert, Esq. — Observa- 

 tions of the Planets during the Period of their respective Op- 

 positions in 1820, 1821, and 1822; with the Computation of 

 their Geocentric Longitudes and Latitudes, by means of the 

 assumed Parallax therein mentioned, and of his own Tables 

 of Refraction. By S. Groombridge, Esq. — On the Triangu- 

 lation of the Cape of Good Hope. By Captain G. Everest. — 

 The Right Ascension and Declination of the Comet of Ja- 

 nuary 1821. By J. N. Nicollet. — On the Correction of the 

 Transit Instrument. By J. J. Littrow. — On the Aberration 

 of Light. By Benjamin Gomperlz, Esq. — On the Measure- 

 ment of Altitudes by the Barometer. By Professor Littrow. 

 — A Note respecting the Application of Machinery to the 

 Calculation of Astronomical Tables. By Charles Babbage, 

 Esq. — Observations on the Application of Machinery to the 

 Computation of Mathematical Tables. By Charles Babbage, 

 Esq. — On some new Tables for determining the Time, by 

 means of Altitudes taken near the Prime Vertical. By Francis 

 Bailv, Esq. — On a new Method of computing Occupations of 



the 



