THE 



SCIENTIFIC PEOCEEDINGS 



OP THE 



KOYAL DUBLIN SOCIETY. 



Vol. III. (New Series). AUGUST, 1882, Part V. 



CONTENTS. 



Page 

 XXL A Catalogue of Birds obtained in Navarro County, Texas, 



hj J. Douglas Ogilby, . . , . . . .169 



XXII. Note on Mr. J. J. Thomson's Investigation of the Electro- 

 Magnetic Action of a Moving Electrified Sphere, by George 

 Francis Fitzgerald, Fellow of Trinity College, Dublin, 

 and Erasmus Smith's Professor of Natural and Experi- 

 mental Philosophy in the University of Dublin, . . 250 



XXIII. On a New Form of Apparatus for Estimating Ammonia in 



Potable Waters, by C. R. Tichbornb, ll.d., f.c.s., &c., . 255 



XXIV. On a New Analysis of the Lucan Sulphur Spa, by J. 



P^MERsoN Reynolds, m.d., f.r.s.. Professor of Chemistry, 

 University of Dublin, ....... 258 



XXV. On the Mode of Occurrence and Winning of Gold in 



Ireland, by Gerhard A. Kinahan. Plates 20 and 21, . 263 



XXVI. Alphabetical List of the Parasitical Algje of the Firth of 

 Forth, by George William Traill, Joppa, near Edin- 

 burgh, 286 



XXVn. Catalogue of the Examples of Meteoric Falls in the 



Museums of Dublin, by Professor V. Ball, m.a., f.r.s., . 298 



The Authors alone are responsible Jbr all opinions expressed in their communications. 



DUBLIN: 



PUBLISHED BY THE BOYAL DUBLIN SOCIETY. 



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