THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Yol.YII.(KS.) OCTOBEE, 1892. Part 5. 



CONTENTS. PAGE 



XXXII. — Revolving Machinery for the Domes of Astronomical Obser- 

 vatories. By Sib, HowAKD Gkubb, F.R.S., . . . 484 

 XXXIII. — On an Improved Equatorial Telescope. By Sm Howaud 



Gkfbb, F.R.S., 492 



XXXIV. — Reports on the Zoological Collections made in Torres Straits 

 by Professor A. C. H addon, 1888-1889. Notes on a 

 Small Collection of Hydrocorallinse. By Stdney J. 

 HiCKSON, M.A., D.Sc, Fellow and Lecturer of Downing 

 College, Cambridge. (Plates XVIIL, XIX., XX.), . . 496 

 XXXV. — The Variolite of Annalong, Co. Down. By Professok 



G-KENviLLE A. J. Cole, F.G-.S. (Plate XXI.), . . 511 

 XXXVI.— On the Eehinoderms collected by the SS. "Fingal" in 1890, 

 and by the SS. "Harlequin" in 1891, off the "West Coast 

 of Ireland. By F. Jeffrey Bell, M.A., Sec. R.M.S. 



(Plates XXIIL, XXIV., XXV.), 520 



XXXVII. — On the Appreciation of Ultra-Visible Quantities, and on a 

 Gauge to help us to appreciate them. By G. Johnstone 

 Stoney, M.A., D.Sc, F.R.S., Vice-President, Royal Dub- 

 lin Society, ......... 530 



XXXVIII. — "Why there is no Atmosphere on the Moon. By G, John- 

 stone SxoNEY, F.R.S., 546 



XXXIX — On a Mercury- Glycerine Barometer. By J. Joly, M.A., 



D.Sc, F.R.S., 547 



XL Reports on the Zoological Collections made in Torres 



Straits by Professor A. C. Haddon, 1888-1889. Pycno- 

 gonida. By George H. Carpenter, B.Sc, Lond., 

 Assistant Naturalist in the Science and Art Museum, 



Dublin, 552 



XLI. — On a Direct Reading Electrolytic Ampere Meter. By J. Joly, 



M.A., D.Sc, F.R.S., 559 



XLII. — On a Speculation as to a Pre-Material Condition of the 



Universe. By J. Joly, M.A., D.Sc, F.R.S., . . .563 

 XLIII. — Preliminary Note on the Walking of some of the Anthro- 



poda. By H. H. Dixon, 574 



List of Scientific Publications, 1-4 



Title-page and Contents to Volume VII. 



The Authors alone are responsible for all Opinions expressed in their Communications. 



DUBLIN: 



PUBLISHED BY THE EOYAL DUBLIN SOCIETY. 



LONDON: WILLIAMS & NOEGATE, 14, HENRIETTA-STREET, 

 COVENT GARDEN. 



1892. 



Price Five Shillings. 



