CONTENTS, 



VOLUME VIII. 

 1861-1864. 



PAGE 



On Earth -Currents, and their Connexion with Terrestrial Magnetism, By the Rev. 



H. Lloyd, D. D 1, 136 



On the Hydrocarbonates and Silicates of Zinc at Santander. By Professor 



Sullivan, and J. P. O'Reilly, Esq 6 



On a Graphical Mode of Calculating the Tidal Drift in the British Seas. By the 



Rev. S. Haughton, M. D 25 



^ Memoir of Stephen White. By the Rev. W. Reeves, D. D 29 



On Mapped Surveys of Ireland. By W. H. Hardinge, Esq 39 



On Changes produced by Heat in SiUcate of Zinc. By Professor Sullivan. . . 65 



On a New Hydrated Silicate of Potash. By Professor Sullivan . 56 



Description of Antiquarian Drawings. By G. V. Du Noyer, Esq 61 



y Synopsis of British Crangonidse and Galatheidae. By J. R. Kinahan, M. D. . , 67 



On Gold Antiquities found in Ireland prior to 1747. By W. R. Wilde, Esq. . 82 

 On the Dynamical Coefficients of Elasticity of certain Substances. By the Rev. 



S. Haughton, M. D 86 



On the Velocities of Rifle Bullets. By the Rev. S. Haughton, M. D. .... 105 



On Cromlechs in Northern Africa. By R. R. Madden, M. D. 117 



On the Island of Sanda. By the Rev. W. Reeves, D. D 132 



On the Rain-fall and Evaporation at St. Helena. By Lieutenant J. Haughton . 139 

 On the Rain- fall and Evaporation in Dublin, 1860. By the Rev. S. Haugh- 

 ton, M. D. 153 



On the Partial Combustion of Iron. By E. Clibborn, Esq 164 



On the Rain-fall and Wind at Simon's Bay. By F. Churchill, Esq 171 



On a New and General Method of Inverting a Linear and Quaternion Function of 



a Quaternion. By Sir W. R. Hamilton, LL. D 182 



On the Probable Causes of Earth- Currents. By the Rev. H. Lloyd, D. D. . . 184 

 On the Existence of a Symbolic and Biquadratic Equation M'hich is satisfied by 

 the Symbol of Linear Operation in Quaternions. By Sir W. K. Hamilton, 



LL. D 192 



On the Strength of Long Pillars. By B. B, Stoney, Esq. ....... 191 



