CONTENTS. iii 
Art. XV. On the Geognostical Structure of the Appennineg. 
By Professor Hausmann. Communicated by the 
Author, - - - 153 
XVI. Description and Analysis of Sordawalite, a New 
Mineral from Finland. By ,M. G. Norden- 
skiold, Esq. - - - 162 
XVII. Speculations in regard to the Formation of Opal, 
Woodstone, and Diamond. By Professor Jame- 
son, t - •* - l6S 
XVIII. An Account of some Electro-Magnetic Experiments 
made in the University of Utrecht. By Dr Van 
Beek, Major-General Baron Van Zuylen Van 
Nyevelt, and Professor G. Mole. Communi- 
cated by the Authors, - - 167 
XIX. Description of Mr Perkins's New Steam-Engine, 
and of the application of his Invention to En- 
gines of the Old Construction, - 172 
XX. Abstract of Experiments on the F usion of Plum- 
bago, Anthracite, and the Diamond. By Profes- 
sor Silliman, - - 179 
XXL Celestial Phenomena from July 1. to October 1. 
1823, calculated for the Meridian of Edinburgh, 
Mean Time. By Mr George Innes, Aberdeen, 184* 
XXII. Proceedings of the Royal Society of Edinburgh. 
(Continued from Vol. VIII. p. 386.) - 18.5 
XXIII. Proceedings of the Wernerian Natural History So- 
ciety. (Continued from Vol. VIII. p. 388.) 187 
XXIV. Proceedings of the Society of Arts for Scotland, 189 
XXV. Scientific Intelligence, - - 19 J 
I. NATURAL PHILOSOPHY. 
Astronomy. 1. Comet of Encke re-discovered in New South 
Wales. 2. Errors of the Lunar Tables from 1783 to 1823, 193 
Optics. 3 . Phosphorescence and Structure of the Chara vul- 
garis and hispida, - - - - , 194 ’ 
Meteorology. 4. Remarkable Hail-shower. *5. Severe Cold 
of last winter in Holland. 6. Variations in the Bulbs of 
Thermometers. 7* Meteoric Stone of Epinal, - 194-196 
Electricity. 8 . Animal Electricity, - - 1-9,6 
Mechanics. 9- Mr Babbage’s Calculating Engine. 10. Te- 
nacity of Iron- wire not Altered by Heat or Cold, - 197 
