Vol. 38. 



Published the Last Day of every Month 

 [PRICE 2s. 6d.] 



THE 



U PHILOSOPHICAL MAGAZINE 



COMPKEKBNDINO 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



GEOLOGY, AGRICULTURE, 



MANUFACTURES AND COMMERCE. 



NUMBER CLX. 

 For AUGUST \^n. 



CONTAINING THE FOLLOWING ENGRAVINGS BY PORTfiR: 

 .^,y^ 3. Mr. Moolt's Filtering Apparatus r ' 



'r ■■/ 



Br ALEXANDER TlLLOCH, 



M.R.l.A. F.s.A. EDIN. AND PERTH, &C. 



LONDON. 



PRINTJSD ET RICHARD TAYLOR AND CO., SHOE lAWE: 



indsold by R.cHARDsoNSj Cadbll and Davies; Longman E 

 , MuHr..n; HiGHLF/^i t.HERwor.DanclCo.j Hardinoj London'!^ 

 ^y* 1 and Gilbert and Hodges, Dublin. 



