THE 
EDINBURGH NEW 
PHILOSOPHICAL JOURNAL, 
EXHIBITING A VIEW OF THE 
PROGRESSIVE DISCOVERIES AND IMPROVEMENTS 
IN THE 
SCIENCES AND THE 
ROBERT JAMESON, 
REGIUS PROFESSOR OF NATURAL HISTORY, LECTURER ON MINERALOGY, AND KEEPER OF 
THE MUSEUM IN THE UNIVERSITY OF EDINBURGH; 
Fellow of the Royal Societies of London and Edinburgh ; Honorary Member of the Royal Irish Academy ; of the 
Royal Society of Sciences of Denmark ; of the Royal Academy of Sciences of Berlin ; of the Royal Academy of 
Naples ; of the Geological Society of France; Honorary Member of the Asiatic Society of Calcutta ; Fellow of 
the Royal Linnean, and of the Geological Societies of London ; of the Royal Geological Society of Cornwall, and 
of the Cambridge Philosophical Society ; of the Antiquarian, Wernerian Natural History, Royal Medical, Royal 
Physieal, and Horticultural Societies of Edinburgh ; of the Highland and Agricultural Society of Scotland ; of 
the Antiquarian and Literary Society of Perth; of the Statistical Society of Glasgow ; of the Royal Dublin 
Society ; of the York, Bristol, Cambrian, Whitby, Northern, and Cork Institutions ; of the Natural History So- 
ciety of Northumberland, Durham, and Newcastle ; of the Imperial Pharmaceutical Society of Petersburgh ; of 
the Natural History Society of Wetterau ; of the Mineralogical Society of Jena ; of the Royal Mineralogical So- 
ciety of Dresden ; of the Natural History Society of Paris ; of the Philomathic Society of Paris ; of the Natural 
History Society of Calyados ; of the Senkenberg Society of Natural History ; of the Society of Natural Sciences 
and Medicine of Heidelberg ; Honorary Member of the Literary and Philosophical Society of New York ; of 
the New York Historical Society ; of the American Antiquarian Society ; of the Academy of Natural Sciences of 
Philadelphia ; of the Lyceum of Natural History of New York ; of the Natural History Society of Montreal ; of 
the Franklin Institute of the State of Pennsylvania for the Promotion of the Mechanical Arts 3 of the Geologicai 
Society of Pennsylvania ; of the Boston Society of Natural History of the United States ; of the South African 
Institution of the Cape of Good Hope ; Honorary Member of the Statistical Society of France ; Member of the 
Entomological Society of Stettin, &c. &ec. &c. 
OCTOBER 1849 .... APRIL 1850. 
VOL. XLVIILI. 
70 BE CONTINUED QUARTERLY. 
EDINBURGH: 
ADAM AND CHARLES BLACK. 
LONGMAN, BROWN, GREEN, & LONGMANS, LONDON. 
1850. 
