vi List of the Contrihtitors. 
Burton, Charles E., B.A. page. 
On Results obtained by the Agosta Expedition to observe the 
recent Solar Eclipse (1870), 113 
DAWSOif, J. W., LL. D., F. R. S. 
Note on Eozoon Canadense, . . . . . . .117 
Addendum to the foregoing Paper, 129 
Donovan, Michael. 
Observations on Earl Stanhope's alleged imperfections of the 
Tuning Fork, 238 
Description of a Comparable Hygrometer, which registers the 
maximum and minimum of Siccity and Humidity of the 
Atmosphere in the absence of an observer, with observations 
on its employment (Plate xxv.), ..... 476 
On some improvements of the above, . . . . . 555 
Draper, Harry N., F.C.S., and Moss, Richard J., F.C.S. 
On some Forms of Selenium, and on the Influence of Light on 
the Electrical Conductivity of this element, . . . 529 
Furlong, Nicholas, M. D. 
Description of an Instrument for keeping up Artificial 
Respiration (Plates xxvi. and xxvii.), .... 493 
Hardman, Edward T., F.C.S. 
On a Supposed Substitution of Zinc for Magnesium in Minerals, 533 
Hayden, Thomas, M.D. 
On the Respiration of Compressed Air, . . . . .199 
Hennessy, Henry, F. R. S. 
Addition to the Note on Two Streams flowing from the same 
source in opposite directions, ...... 36 
On the Floatation of Sand by the rising tide in a tidal 
estuary, . . . . . . . . . .153 
Notes of Observations of Phenomena in Optical Meteorology, . 246 
On an Inverted Lunar Halo, and a Lunar Rainbow (Plate 
xxxiii.), 548 
Additional instances of the Tidal Floatation of Sand, . . 554 
Hunt, T. Sterry, LL.D., F.R.S. 
Notes on Messrs. King and Rowney's Paper on Eozoon Cana- 
dense, . . . . . . . . . .123 
Jellett, Rev. J. H., B.D., S.F.T.C.D. 
On an Optical Method by means of which the formation of 
definite Chemical Compounds may be in certain cases 
determined (abstract), . . . . . . , 31 
Address delivered before the Academy as President, . . 50 
On Optical Saccharometry, with special reference to an 
examination of some specimens of Sugar Beet, grown in 
Ireland, 1(^7 
