Piihlj/hed the 'Lqfl Day of every Months 

 CPRICE TWO SHILLINGS.] 



THE 



PHILOSOPHICAL MAGAZINE, 



NUMBER XXV. 



JUNE 1800. 



ILLUSTBATEb W tTH 



THE FOLLOWING ENGRAVINGS 5Y MR. LQ^Ti 

 :. A Plate iUuftratlng an unufual horizontal Rcfraftfon of the Air 



LONDON: 



PBIXTED LY DAVIS, WiLKS, AND TAYLOR, CHAHCMY Z.MB; 



FOR A. tilloch: 



And fold by MeflTrs. Richardson, Comhil!} Cadbll andDAViSB, 



St^andjDEnRBTT Piccadilly 3 Symonds. Patcmofter-rowi ' 



MuRRAv and H.ohlet, No. 32, Fleet.-ftreet; BuiV. 



^o. 148, Oxford-ftreet; VEKNOit andHooD, PouIUYi 



Hardiwg, No, 36, St. JamcsVftreet; Westj|.ey, 



No i^g, strand ; J. RbmKant, High-ftwt, 



BloomO>ury; W. Rbmnawt, HambArghs 



and W. QiiBBRT, Di»blin. 



