11 CONTENTS. ' 



Pajpe 



2. Account of Caverns in the Empire of Tungkin, . 263 



3. Account of the Mirage of Central India, . 265 



4. A farther Account of the Cave of Booban, . 268 



5. Account of the Burning Mountain in Australasia, called Mount 

 Wingen, near Hunter's River. By the Reverend Mr Wilton of 

 Paramatta, , . . 270 



XIV. Description of a Method of Cutting Screws, with drawings of the ap- 

 paratus employed. By Jajies Clabk, Steeple Clock and Machine 

 Maker, Old Assembly Close, Edinburgh. Communicated by the Au- 

 thor, . . . .273 

 XV. Memoir on the Fossil Bones of ^nt Privat-d'-Allier, (in the pro- 

 vince of Velay, France,) and upon the basaltic district in which they 

 have been discovered. By M. J. M. Behtrand de Doue, Mem- 

 ber of the Society of Agriculture, Science, Arts, and Commerce of Le 

 Puy, of the Geological Society of London, &c., . 276 



XVI. General view of the Scientific researches recently carried on in the 

 Russian Empire. In a discourse pronounced at the Extraordinary 

 sitting of the Imperial Academy of Sciences of St Petersburg, held 

 on the 28th November 1829. By Baron Alexander de Hu3I- 

 BOLDT, . . . 286 



XVII. Additional Contributions towards the History of the Cervus Euryce- 

 ros, or Fossil Elk of Ireland. By S. Hibbert, M. D., F. R. S.E. 

 &c. Communicated by the Author, . ' • 301 



XVIII. Investigation of the Spherical Aberration of a Diamond Lens. By 

 Mr Andrew Pritchard, Hon. Mem. Soc. Arts, Scot. &c. Com- 

 nounicated by C. R. Goring, M. D. . .317 



XIX. Account of another remarkable Case of Spectral Illusion. Continued 



from Art. IV. p. 222 of this Number, . 319 



XX. Notice respecting Mr Cuthbert's Elliptic Metals for Reflecting Micro- 

 scopes. Communicated by a Correspondent, . 321 



XXL An outline of Dr Knox's theory of Hermaphrodism, and the appli- 

 cation of its principles to the generative and respiratory organs, 322 



XXI L Physical Notices of the Bay of Naples. No. VII — On the Islandis 

 ef Procida and Ischia. By James D. Forbes, Esq. Communi- 

 cated by tlie Author, . • 326 



XXIIL HISTORY OF MECHANICAL INVENTIONS AND OF PRO- 

 CESSES AND MATERIALS USED IN THE FINE AND 

 USEFUL ARTS, . . .350 



1. Notice of the Rock Crystal Watch of M. Rebillier. From a Re- 

 port to tlie Institute by MM. Prony and Navier, . ib. 



2. Account of Dr Ranken's Thermantidote for cooling apartments in 



hot climates, . . • 351 



3. Chinese mode of making Vermilion, . 352 



4. Chinese Mode of making Indigo, . • 353 



5. Account of the preparation of Olcocere or a wafac Ibr candles ftom 

 Castor oil. By Mr S. Tytler, . • ib. 



XXIV. ANALYSIS OF SCIENTIFIC BOOKS AND MEMOIRS, 355 



1. The Article Ship-Building. Published in Vol. xviii. Part I. 

 of the Edinburgh Encyclopfedia. Edited by Dr Brewster. Con- 

 tinued from page 171j • • - ^^ 



