Vol. 21. March 1805. 



Published the Last Day of every Morith, 

 [PRICE 2s. 6d.] 



THE 



PHILOSOPHICAL MAGAZINE 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND 



COMMERCE. 



NUMBER LXXXII. 

 For MARCH 1805. 



lLLUSriU.TED WITH THE FOLLOWING ENGRAVINGS, 

 BY LOWRY: 



\, Mr. Rawlinson's improved Mill for grinding Oil Colours j 

 and an improved Mill for grinding Indigo, or other dry 

 Colours. 



2. Mr, Pardy's improved Method of Banking the Balance of 

 a Time-keeper. 



BT ALEXANDER TILLOCH, 



I HONORAKT MBMBEK OF THE HOYAL IRISH ACADEMY, &C. &C. &C. 





LONDON: 



Printed ly R. Taylor and Co^ 38, Shoe Lome, Fleet Street, 

 FOR A. TILI.OCH : 

 And sold by Messrs. Richardson; Cadell and Davies ; Long- 

 man, HyssT. Rees, and Orme ; Stmonds ; Murray ; High- 

 ley; Veknor and Hood; Harding j London: Bell and 

 Rkadfute, EdirlMirgh; Brash and Reid, and D. JMevin, 

 Glaogow; and GiLiirtRT and Hodges, Dublin. 



^^^^n?- i' I iT'^finwriiMrf'^f In! 



