THE 



JOURNAL OF SCIENCE, 



EXHIBITING ^ ' 



f A VIEW OF THE PROGRESS OF DISCOVERY 



I>r NATURAL PHILOSOPHY, CHEMISTEY, MINERALOGY, GEOLOGY, BOTANY, 

 ZOOLOGY, COMPARATIVE ANATOMY, PRACTICAL MECHANICS, GEOGRAPHY, 

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



CONDUCTED BY 



DAVID BREWSTER, LL.D. 



P.R.S. LOND. SEC. R.S. EDIN. F.S.S.A. 



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



IRISH ACADEMY ; MEMBER OF THE ROYAL SWEDISH ACADEMY OF SCIENCES; 



AND OP THE ROYAL SOCIETY OF SCIENCES OF DENMARK, &C, &C. 



VOL. VII. 

 APRIL—OCTOBER. 



JOHN THOMSON, EDINBURGH: 

 AND T. CADELL, LONDON. 



M.DCCC.XXVII. 



