CONTENTS. 
SCIENCE. 
ART. 
I. On the Determination of the Intensity of the Earth's Magnetic Force 
in absolute measure. By the Rev. Humrurey Luoyp, D.D., F.R.S., 
M.R.IA., §c., Fellow of Trinity ae Dublin. Read January 9, 
1843. 
IL. An Besay towards a diet Tr. ache ‘Yy of potelliae Reflexion ae 
Refraction. By James Mac Cuutacu, LL. D., MR. L_A., Fellow 
of Trinity College, Dublin. Read December 9, 1839. ; 
III. On the Dynamics of Earthquakes ; being an attempt to reduce their 
observed phenomena to the known laws of Wave Motion in solids 
and fluids. By Rosert Matter, Esg., Mem. Ins. C. E. ; 
M.R.I.A. Read February 9, 1846. 
- On the Objects, Construction, and Use of certain new Taina ie 
self-registration of the passage of Earthquake shocks. By Ropert 
Matter, Esq., Mem.Ins.C.E.; M.R.I.A. Read June 22, 1846. 
V. Observations on Comets, made at the Observatory of Markree, during 
the first siz months of the Year 1846. By Epwarp J. Cooper, 
Esq., M.R.I.A. Read July 20, 1846. ; 
VI. On the Analysis of Discontinuous Functions. By Cane Bone 
Esq. Read July 20, 1846. 
VII. On a certain Multiple Definite Integral. By Cae Boe ag. 
Read April 13, 1846. ; . 
VUL On the Equilibrium and Motion of fold aa ‘fui Bias ae 
the Rev. Samuet Haveuton, M. RP. I. A., Fellow cE Tr 4 Col 
lege, Dublin. Read May 25, 1846. . . 
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