Vol. 



July 1812. 



No. 171. 



mm 





illiiii 



Published the Last Day of every Month, 

 [PRICE 2s. 6cl.] 



THE 



PHILOSOPHICAL MAGAZINE 



COMPREHENDING 



GEOLOGY, 

 THE VARIOUS BRANCHES OF SCIENCE, 



. THE LIBER ^L AND FINE ARTS, 



AGRICULTURE, 



MANUFACTURES AND COMMERCE. 



NUMBER CLXXL 

 For JULY 1812. 



CONTAINING THK FOLLOWING ENGRAVINGS: 



I. A Plate to illiistr.ite the Foundation of Mr. William Jones's tem- 

 porary fCoro R'ck. 

 '2. Mr. Stepiieks's Method of dividing Bricks. 



3. .Section <>t Mr. Wilmam Jones's ie:npor:iry Corn Rick. 



4. Mr. \V.\istkll's Improvement on the .-^corii Dibble. 



Br ALEXANDER TIL LOCH, 



M.K.I. A; F.S.A. BDIM. AMD PERTH, &C. 



LONDON: 



PRINTED BY RICHARD TAYLOR AND CO., SHOE LANS: 



jAiidsoldby Richardsohs; Cadell and Davies; Longman, 

 HuHST, Rers, Ou.MB & Brown; Murray; HiGHLEYj Sher-| 

 WOOD and Co.j Hardim'o; London: Constable and Co. 

 Edinburgh: Brash and Rkid, and D. Niven, Glasgow:, 

 and Gilbert and Hodges, Dublin. 



SiiJ-»'='ifi|^^s^»5i:-'**1i^:>*- 



