vi Contents. 
PART V. 
XLVI.—Some Remarks on Difficulties of Meridian Circle Work. By 
Arruur E. Lystrr, M.A., . 
XLVII.—A Method of Using Cosine Beislewin + as the Teeter en 
Beacons and Buoys by which a Continuous Light may be 
maintained, Day and Night, for Weeks or Months, without 
the Necessity for the Attendance of a Light-keeper. By Joun 
R. Wieuam, M.R.I.A., Member of the Council of the Royal 
Dublin Society, 
XLVIII.—On Hamilton’s Singular Poms ane Planes on resales Ware 
; Surface. By Prorrssor Witi1am Booru, M.A., Hoogly 
College, Bengal, . : 
XLIX.—On the Rotation- Period of the « fe eaaes ie Shs on J amie By 
Arruur A. Rampaut, M.A., D.Sc., F.R.A.S., 
L.—Note on Irish Annelids in ‘ine ihereenin of Seigues and Art 
Dublin.—No. I. By W. C. M‘Invosu, Professor of Natural 
History in St. Andrew’s University, 
LI.—The Hydroids of the Irish Coast. By J. E. Cana, A.R. C. Sc. 
(Lond.) ; Curator of the Museum, Kingston, Jamaica, 
LII.—The Distribution of Drift in Ireland in its relation to Nena 
ture. By J. R. Kitroez, (formerly) F.C.S., H. M. Geological 
Survey (Plate XV.), : 
LITI.—Note on the Worm askoueededl ain Honhghene prolifera. By 
FLorencre BucHANAN, . 
LIV.—On some Dragonflies in the Dublin Wao of isciemee and Art, 
By Gzorer H. Carprnter, B.Sc. (Lond.), Assistant Natu- 
ralist in the Science and Art Museum, Dublin. (Plate XVI.), 
LY.—The Geographical Distribution of Dragonflies. By Gzuorcr H. 
CarpPEnTER, B.Sc. (Lond.), F.E.8., Assistant Naturalist in 
the Science and Art Museum, Dublin. (Plate XVII.), . 
LVI.—Application of the Parallelogram Law in Kinematics. By Tuomas 
Preston, M.A., F.R.U.1., 
LV1II.—Report of the (ontmnttes! boneeene of Protsevor W. J. Sollee, 
LL.D., F.R.S., R. Lloyd Praeger, B.A., B.H., A. F. Dixon, 
M.B., ‘al Alfred Delap, B.A., B.E., a nomed by the Royal 
Dublin Society to investigate the recent Bog-flow in Kerry. 
Drawn up by R. Luoyp PRAEGER and PRorsssor SoLLAS. 
(Plates XVIII. and XIX.), 
PAR Eval 
LVIII.—On the Geological Investigation of Submarine Rocks. By J. 
Jory, M.A., B.A.I., D.Sc., F.R.S., Hon. Secretary, Royal 
Dublin Sada (Plate XX.), 
LIX.—Short Account of an Experlment to Deters the aoa Parton 
in a Focus Tube from which the X-Rays are emitted. By 
the Very Rzy. Grratp Moutoy, D.D., D.8c., 
LX.—A New Method of Conferring Dicinemeeiee Giecremete 
Appearance upon Illuminated Buoys and Beacons for Har- 
bours, Estuaries, and Rivers. By J. R. WicHam, M.R.I.A., 
Member of the Council of the Royal Dublin Society, . 
PAGE 
375 
377 
381 
389 
399 
405 
421 
432 
434 
439 
469 
475 
509 
515 
519 
