COl^T^ENTS—coniinued. 



PAGE 



XXIII. Furtlier Researelies on tlie supposed Substitution of Zinc for Mag- 



nesium in Minerals. By Edward T. HAEDMAisr, F.C.S., &c., 

 Geological Survey of Ireland, 146 



XXIV. On tlie Negative Pedal of a Central Conic. By JohjS" C. Maxet, 



M.A. (Abstract), 151 



XXV. On tbe Extraction of Iodine and Bromine from Kelp. By Eobeet 

 Gailoway, F.C.S., Professor of Chemistry in tbe Royal CoUege 

 of Science for Ireland, . . . . , 152 



XXVI. On a K'e'w Chemical Test for Carbolic Acid, and its Useful Appl - 

 cations. By Edjiun-d W. Davy, A. M.,M. D., Professor of 

 Forensic Medicine, Eoyal College of Sui'geons, Ireland, . . . 155 



XXVII. On Hullite, a hitherto undescribed Mineral ; a Hydrous SiUcate 

 of peculiar composition, from Carnmoney Hill, Co. Antrim, with 

 Analysis. By Edwaed T. Haedmabt, F.C.S., H. M. Geological 

 Survey. With Notes on the Microscopical Appearances, by 

 Profesw HiJXL, F.R.S., 161 



XXVIII. Further Observations on Pyrrol and its Derivatives. By 



Chichestee a. Bell, M.B., University of Dublin, .... 168 



XXIX. On the Distillation Prodxicts of the Saccharates of Ammonium and 

 Ethylammonium. By Edwist Lappee, F.C.S., L.C.P.I., and 

 Chichestee A. Bell, M.B., University of Dublin, .... 176 



Minutes of Proceedings from Nov. 12, 1877, to June 24, 1878, . . . . 1 to 58 



-for Ztst of Pullications of the Academy, see pagiz ii and ill of this Cover. 



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 or to Hodges, Postee, & Co., Dublin ; or Wixliams & Noegate, Henrietta- 

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