IV 
CONTENTS. 
Lead and Native Sulplmret of Selenium. 10. Sulphato- 
tri-carbonate of Lead. 11. Native Magnesia, or Hydrate 
of Magnesia. 12. Magnesite from Salem in India. 13 . 
Olivine. 14. Crysolite, - - 188-191 
GEOLOGY. 
15. Evolution of Carbonic Acid Gas at the Lake of Laach, 
and in the Volcanic district of the Eifel. 16. Brown 
Hematitic Iron-ore found around Cast-iron Pipes, 191-19$ 
BOTANY. 
17- Presence of Oxalate of Lime in the Mineral Kingdom, and 
the existence of the same Salt in great quantity in Lichens, 19$ 
ZOOLOGY. 
18. Rectification of some popular errors regarding the Shark. 
19. Durability of Human Hair. 20 . Fossil and Live 
Shells of the same species differ, according to Locality, 
Distance, &c. 21 . The same Fossil Species of Shells are 
associated with different suites of species in different loca- 
lities. 22 . Greater constancy of character and association 
in the Organic Remains in Old than in New Rocks, 194-197 
COMPARATIVE ANATOMY. 
23 . Dr Grant on the existence of the Pancreas in some species 
of the Cuttle-fish Tribe. 24. On the existence of a Pan- 
creas in the Doris Argo, - - - 197* 19$ 
CHEMISTRY. 
25 . Iodine discovered in various marine productions, - 198 
ARTS. 
26. Improved Cement for holding small Lenses whilst grind- 
ing and polishing them, - - - 199 
POLITICAL ECONOMY. 
27. Present Population of Ireland, as contrasted with that of 
other Countries, - ib. 
HISTORY. 
28. Burial Place of the Inventor of Logarithms, - 201 
NEW PUBLICATIONS. 
29. Mohs’ System of Mineralogy, translated from the German 
by Mr Haidinger. 30. Buchanan’s Illustrations of Acous- 
tic Surgery. 31. An attempt to establish the First Prin- 
ciples of Chemistry by Experiments ; by Dr Thomson, 
Professor of Chemistry in the University of Glasgow, 202 
Art. XXVIII. List of Patents granted in Scotland from 7th 
March to 25th May 1825, - - 203 
