COJ^T^E-NTS— continued. 



TAGB 



VIII. Eeports from the OTDservatoiy of Trinity College, Dublin. Xo. 1. — 

 On the metliocl of llegulating- a Clock intended to show Cori'ect Mean' 

 Time. By Eobekt S. Ball, LL.D., F.E,.S., Andrews Professor of 

 Astronomj- in the University of Dublin, aiod-Eoyal Astronomer of 



Ireland, ". .."...... 66 



IX. Proof of Hamilton's Principle of Varying Action. By Professor 



Tait. (Communicated by Dk. Baxl)," '..... 69 



X. Laboratory Xotes. 2^o. 6. — On the Formation of Magnetic Oxide by 

 the Dissociation of Ferrous Salts. By C. E. C. TiCHBORifE, Ph.D., 



F.C.S., &c., 70 



XI . Observations on the Phenomena of the Tides as observed at Fleetwood, 

 Lancashii-e ; with Illustrations from the Tides of Eatkmulian, Co. 

 Donegal. By the Eev. Jaxes PEARSoif, M.A., Cantab., Ex-Scholar, 



Trinity CoUege, Cambridge, 72 



XII. Pteport on the Solid and Gaseous Constituents of the MaUow Spa, in 

 the County of Cork. By Wm. Pluntkett, FeUow of the Chemical 

 Society ; and La>X'elot Studdeet, LL.D., Ex-Scholar, Trinitj'- Col- 

 lege, DubHn, c "lo 



XIII. On the Gaseoits Constituents of the Vartry and Grand Canal "Waters. 



By ARCHIBALD X. M'AlpijS'e, B. Sc, Assoc. E. C. Sc. I. ; and Chuis- 

 TOPHEE, CLAiiKE HutchixsojS-, Eoyal Exhibitioner, Eoyal CoUege of 

 Science, 79 



XIV. On the Volumetric Estimation of Chromium. By Thomas Bayxet, 86 



Explanation of Plates 1 & 2. 



Minutes of Proceedings fi'om Xov. 13, 1876, to June 25, 1877, . . clvii to cxcii 



Title-page, Table of Contents, and Index to Volume I., Series II. 

 Do. do. do. Volume II., Series II. 



For List of Puhlications of the Academy, see pages ii ^ iii o/ this Cover. 



Applications for any of the Fuhlications of the Academy are to be addressed to 

 the Tjieasitrer of the Royal Ieish Academy, 19, Dawson-street, Dublin; 

 or to Hodges, Poster, & Co., Dublin; orWn-LiAMS & Noegate, Henrietta- 

 street, Covent Garden, London ; 20, South. Prederick-street, Edinburgh. 



Dublin : 



Pkinted at the Univehsity Phess, bt Poksonby & Murphy, 



Printers to the Academy. 



