Sree 
OLENTIFIC PROCEEDINGS 
ROYAL DUBLIN SOCIETY. 
VIIL(N.S.) AUGUST, 1894. Part 3. 
CONTENTS. 
; PAGE 
XXL —Note on the Present Condition of the Water in the Reservoir 
at Roundwood. By W. KE. Aprney, F.I.C., F.C.S., Curator 
in the Royal University of Ireland, . 208 
XXII. —Useful Methods in Teaching Blementary Physics. By 
J.,JOLY, D.Sc., F.R.S., 216 
XXII. —On the Influences of Temperature upon the Sensitiveness of 
the Photographie Dry Plate. By J. Jony, D.Sc., F.R.S.,. 222 
XIy. —Notes on the Vartry Water in November, 1893. By RICHARD 
J. Moss, F.C.S., F.LC.,  . 225 
XXV.—On the Limits of Vision: with Special Reference to the Vision 
of Insects. By G. Jounstone Stoney, M.A., D.Sc., F.R.S., 
Vice-President, Royal Dublin Society, : 228 
ale —On the Post- Embryonic Development of Fungia. By GILBERT 
C. Bourne, M.A., F.L.S., Fellow of New es Oxford. 
(Abstract), : 244 
XVIIl.—On the Reduction of Manganese “Peroxide in Sewage. By 
W. #H. Apewry, Assoc. R.C.8c.1., F.C.8., F.1.C., Curator 
in the Royal University of Ireland, : 247 
VIII.—On a New Form of Equatorial Mounting for Monster Reflect- 
. ing Telescopes. By Str Howarp Gruss, M.A.I., F.R.S., 
Vice-President, Royal Dublin Society, 252 
XIX. —On the Great Meteor of February 8th, 1894. By PROFESSOR — 
Artuur A. Rampart, D.Sc., F.R. A. Sais 258 
_XXX.—On a Method for Colouring Lantern Slides for Scientific Dia- 
a grams and other purposes. By ProressorJ.A.Scort,M.D., 263 
XXXI.—On a Mounting for the Specula of Reflecting Telescopes, 
Designed to Remove the Impediment to their being Used 
for Celestial Photography and Spectroscopy. By G. JoHn- 
sTONE S1onEy, M.A., D.Sc., F.R.S., Vice-President, Royal 
Dublin Society, 266 | 
XXXII.—On the Selection of Suitable Instruments for Photographing 
q the Solar Corona during Total Solar Eclipses. By ALBERT 
a Tayztor, A.R.C.Sc. (Lond.), A.R.S.M., F.R.A.S.,  . 272 
x XII. —On derived Crystals in the Basaltic Andesite of Glasdrumman 
‘ Port, Co. Down. By Grenvinze A. J. Cots, M.R.LA., 
F.G. ie Professor of Geology in the Royal College of Science 
: for Ireland. (Abstract), . 279 R 
XXL. —On the Fossil Fish-Remains of the Coal Measures of the 
British Islands. Part 1].—Acanthodide. By the late Jamus 
a W. Davis, F.G.S., F.L.S., F.S.A., &c. (Abstract), . AAPATS) 
XXXV.—On Eozoonal Structure of the ejected Blocks of Monte Somma. 
By Prorrsson H. J. Jounston-Lavis and Dr. J. W. © i eae 
Grecory, F.G.S. (Abstract), . , : : . . 280 7 
7 Authors alone are responsible for all Opinions expressed in their Gommunications. 
DEO BE ESN: . 
PUBLISHED BY THE ROYAL DUBLIN SOCIETY. 
LONDON : WILLIAMS & NORGATE, 14, HENRIETTA- Tae : 
. COVENT GARDEN. \ Gt Aw iGhd 
1894. i \ Aes aes 
en lHal Museo 
Freee ass ntait~t 
Price Two Shillings and Sixpence. 
