CONTENTS. 



SCIENCE. 



Page 



I. AN Account of a New Mineral Substance, discovered at Killiney, 



in the Vicinity of Dublin. By Thomas Taylor, M. D. 

 M.R.I. A. F. L.S. Read June 23d, I817. - S 



II. Observations on Curvatures of the Spine. By James Macartney, 



M. D. M, R. I. A. F. R. S. Professor of Anatomy and Sur- 

 gery in the University of Dublin, <§c ^c. Read May 19th, 

 I8I7. - - - - - - - 13 



III. Investigations in Physical Astronomy, principally relative to the 



Mean Motion of the Lunar Perigee. By the Rev. John 

 Brinkley, D. D. F. R. S. M. R. I. A. and Andrews' Professor 

 of Astronomy in the University of Dublin. Read April 21s/, 

 1817. This Essay obtained the Conyngh am Medal. - - 25 



IV. Observations relative to the Form of the Arbitrary Constant 



Quantities, that occur in the Integration of certain Differential 

 Equations, and also in the Integration of a certain Equation of 

 Finite Differences. By the Rev. John Brinkley, D. D. F. R. S. 

 M. R. I. A. and Andrews' Professor of Astronomy in the Uni- 

 versity oj Dublin. Read June 'Md, ISI7. - - 53 



V. On the Construction of Furnaces Jor High Heats, and the Theory 



of their Operation. By the Rev. T. R. Robinson, A. M. 

 F. T. C. D. M. R. I. A. Read April 2,1st, in n. . - 63 



d 



