PubliJJjed the Lajl Bay of every Months 

 [PRICE TWO SHILLINGS.] 



THE 



PHILOSOPHICAL MAGAZINE. 



NUMBER XIV. 

 JVLY 1799. 



ILLUSTUATED WITH 



THE FOLLOWING ENGRAVINGS BY MR. LO WRY. 



I. A 4to Plate relative to the StruAure of the Ciyllals of 

 Oxyde of Tin, 



A Plate illuftrating the beft Conftruftion of the Vanes of 

 Windmills, fo far as concerns the Angle of Weather. 



LONDON: 



PRINTED FOR A. TILLOCH: 



And fold by MclTrs. Richardson, CornhiU; Caobll andDATfES, 



Strand; Debrett, Piccadilly; Symonds, Pattmofler-row; 



Murray and Hiohlev, No. 33, Flcet-ftreet; Bell, 



No. 148, Oxford-ftrcet ; Vjjknor and Hood, Poultry; 



Hauoing, No. ^6, St. James's-ftreet; Westlby, 



No. 15;;;, Strand; J. Remmant, High-ftreet, 



Bloomlbury ; W. Gilbert and ArchbR, 



Dublin; and W. Remnaht, 



Han^urgh. 



