vi CONTENTS. 
PAGE. 
On the same. By Sir William R. Hamilton, LAD ok: hee eee 
On “ Etymological Criticism.” By N. L. Benmohel, Esq. . . . 75 
On the early Alchemical and Chemical i ais a! M. noe 
Esq. . - aay 8l 
On an ctennt Irish eee Pokbited for Rev. Dr. Roieal: By 
George Petrie, LL.D. . - 82 
A Generalization of Pascal’ sirntoretn. By Sir William R. Hamilton. 100 
Inaugural Address. By the Rey. Thomas R. Robinson, D.D.. . 101 
On Comets. By Edward J. Cooper, Esq. . . . - . - - « I12 
On the Connexion between Certain Terminations of Words in the 
Hebrew and in different Indo- pnd ey sasha oh the 
Rey. Francis Crawford. . . . . Abarth, ’ 112 
On Experiments made in Dublin to determine the Azimuthal Motion 
of the Plane of Vibration of a freely suspended Pendulum. By 
the Rev. Samuel Haughton andthe Rev. Joseph A. Galbraith. 117, 177 
On the Emission of Light by Aaeenhanies toni By Pro- 
fessor Allman... . .-. - Sues 2. 23 
On the Original Fluidity of the Barth and some vier ‘Planets, ee! 
the Rev. Samuel Haughton. . . . ... . 127 
On two ancient Anaglyphs, preserved in the MS. ee of si Li. 
brary of Trinity Colleges Dublin. my the Rev. James Kennedy 
Bailie, D. D. . re PASS 
On an ancient Irish See a ae in be Chapter-howse, West- 
minster. By the Rev. William Reeves, D. D. As . 132 
On Concert Pitch. By Michael Donovan, Esq.. - . - - 138 
On an Apparatus intended to illustrate the Azimuthal Motion of a 
freely suspended Pendulum. By the Rev. Robert V. Dixon. . 139 
On a Formula, containing a Symbol which denotes Rotation through 
a given angle and round a given axis, by means of Rectangular 
Co-ordinates and Differential Co- efficients. By the Rey. Charles 
Graves,D.D. . . . ne teahe » eee 
A Letter from the Rev. R. v. Dixin, proposing to establish a Mu- 
seum in Trinity College, Dublin, ‘for pice aik Instruments 
and Apparatus fallen into disuse. . . - 5 UMPC ERC m sor 
On the Experimental Determination of the Limits of the Transit 
Rate of the Propagation of Waves or Pulses, analogous to those 
of Earthquakes through solid materials. By ‘Robert Mallet, Esq. 143 
On the Account of Thomas de Chaddisworth, Custodee of the Tem- 
poralities of the UL re ee from 1221 to 1256. By Sir 
William Betham. . . Ames. wre ls: 
On the Irish MSS. in the Pirates Library. By the Rev. James 
Henthorn Todd, D.D.  . 162 
On the Nature and Piivenine of the Rete Fescuie of Six te. 
tors. By Sir William R. Hamilton, LL.D. . . .- - Ae. 
On a singular Acoustic Phenomenon hasd Roping: Forks. By) M. Do- 
novan, Esq. « ares keys 
