Vol. 60. 



3uLY 1822. 



No. 291. 



Published the Last Day of every Month, 

 [PRICE 2s'. 6d.] 



THE 



1 PHILOSOPHICAL MAGAZINE 

 AND JOURNAJ.: 



COMFRBHBNDINO 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND COMMERCE. 



NUMBER CCXCI. 

 For JU LY 1822. 



WITH A PLATE BY PORTER, 

 Illustrative of Mrs. Ibbetsqn's Paper on the Pollen of Flowers. < 



By ALEXANDER TILLOCH; LL.D. 



JM.B.I.A, M.Q.S. M.A.S. r.S.A. EDIN. AND PERTH J fORRESPONDINO KEM-^^^ 

 BBB OP THE ROYAL ACADEMY OP SCIENCES, SIUNICH ; ANI> OF THE i 

 ACAIJEMY OP SCIENCES, LITERATURE AND ARTS, LEGHORN, &0. &C, 



A^D RICHARD TAYLOR, F.L.S. 



LONjbON: 



PRI«-TED BY RICHARD AND ARTHUR TAYLOR, SHOE-LANE : 



t And sold by Cadell; 1.oj*gman, Hurst, Reks, Orme, andj 

 Brown; Highley; Sherwood and Co.; Harding; Under-' 

 wood; Simpkin and Marshall; London: CoNSTAULrand Co. 

 Edinburgh: and Pekman, Glasgow. 



