Puhll/bed the La5 Bav of every Months 



[PRICE 'VIB^SHILLINGS.] 



THE 



PHILOSOPHICAL MAGAZINK 



NUMBER XXVL 



JULT 1800. 



ILLUSTRATED WITH 



THE FOLLOWING ENGRAVINGS BY MR. LOWRY: 



I . A Plate to Qluftrate the Theory of the EyenJng and Morning 



Dew. 

 z . The Vcfpertilio Pb'catus. 

 3. A Mercurial Air-hoUcr and Breathing Machine, 



LONDON: 



FRlirriD SY DAVJS, WILKS, A.ND TAYLOR, CHANCERT L\Kt; 



FOR A. tilloch: 



And fold \j Mcflrs. Ricba&dsoh, Cornhill; Cadell andDATiEl| 



Strand; Debrett, Piccadilly ; Symonoj, PatemofleWowi 



MVjkrat and Highley, No. 32, Fleet-ftreet; JBbll, 



No. 148, Oxford-ftrcet ; Vkrkor and Hood, Poultryj 



Hasdino, No. ^6, St. Jamcs's-ftreet 5 Westley, 



No. 159, Strand ; J. Rbmnant, High-ftreet, 



Bloomlbury; W. Remnawt, Hamburgh j 



a^ W« 9iLS£«T, Dublin. 



