jLY 



THE 



JOURNAL OF SCIENCE, 



EXHIBITING 



A VIEW OF THE PROGRESS OF DISCOVERY 



IN NATURAL PHILOSOPHY, CHEMISTRY, MINERALOGY, GEOLOGY, BOTANY, 

 ZOOLOGY, COMPARATIVE ANATOMY, PRACTICAL MECHANICS, GEOGRAPHY, 

 NAVIGATION, STATISTICS, ANTIQUITIES, AND THE FINE AND USEFUL ARTS. 



CONDUCTED BY 



DAVID BREWSTER, LL.D. 



F.R.S. LOND. SEC. R.S. EDIN. F.S.S.A. M.R.I. A. 



CORRESPONDING MEMBER OF THE INSTITUTE OF FRANCE ; CORRESPONDING MEMBER OF THE ROYAL 



PRUSSIAN ACADEMY OF SCIENCES ; MEMBER OF THE ROYAL SWEDISH ACADEMY 



OF SCIENCE8; OF THE ROYAL SOCIETY OF SCIENCES OF DENMARK ; 



OF THE ROYAL SOCIETY OF GOTTINGEN, &C. &C. 



VOL. IX. 

 APRIL—OCTOBER. 



JOHN THOMSON, EDINBURGH: 

 AND T. CADELL, LONDON. 



M.DCCC.XXVIII. 



