CONTENTS. 



VIII. y4n Enquiry into the different Modes ofDemonflration, 

 by ivlnch the Veiocity of /pouting Fluids lias been invejii- 

 gated a priori. By tlie Rev. M. Toung, -D.D. F. T.C.D. 



and M.R.I. J. . - - - Page 8 1 



IX. Gbjervations on Gun-powder. By the Honorable 



George Napier, M R. I. A. - - - 97 



X. Obfervations on the mag?ietic Fluid. By Captain 



O'Brien Drury., of the Royal Naty - - 119 



XI. A critical and anatomical Examination of the Parts 

 immediately tnterejled in tlje Operation for a Catara6l ; 

 •with an Attempt to render the Operatioii it/elf whether 

 by Deprefion or Extra&ion^ more certnin and fuccefsful. 

 By Sylvefer O'Halioran, Efj; M. R. I. A. Honorary 

 Member of the Royal College of Surgeons in Ireland, &c. - 121 



XII. An Account of Experiments made to detertnine the 

 Temperature of the Eartns Surface in the Kingdom of 

 Irelajid in the Tear 1788. By the Rev. William 

 Hamilton, F.T. CD. and M.R.I. A. - - 143 



XIII. Obfervations on Coal-Mines. By Richard Kirwan, 



Ffq; M.R.I.A and F.R.S. - - 157 



XIV. Obfervations on the Properties commonly attributed 

 by medical Writers to human Milk, on the Changes it 

 undergoes in Digefiion, and the Dfeafes fuppofed to 

 originate from this Source in Infancy. By Jofeph 



Clarke, M.D. M.R.I.A. - - - 171 



