iV 
TABLE OF CONTENTS. 
ths 
Part 15.—Notes on the Physical Appearance of the Planet Jupiter during the Season 1880-1. 
By Otto Boeddicker, pu.p. Plate XV. (January, 1882), : : 
16.—Photographs of the Spark Spectra of Twenty-one Elementary sabsuuneed By W. A. 
Hartley, F.R.S.E., Professor of Chemistry, Royal College of Science, Dublin. Plates 
XGV Ale XO VALET a XVIII. (February, 1882), 
17.—Notes on the Physical Appearance of the Comets 6 and ¢, 1881, as chee at Birr 
Castle, Parsonstown, Ireland. By Otto Boeddicker, pu.p. Plate XIX. (August, 
1882), ; ; : : : : . 
18.—On the Laurentian esdks of Donegal, and of sai parts of Ireland. By Edward Hull, 
LL.D., F.R.8., &ec., Director of the Geological Survey of Ireland. Plates XX. and —— : 
Gnas 1882), 6 : 6 é : : 
19.—Palzo-Geological and € heseriitecll Maps of the Br itish Tslands and the adjoiing parts 
of the Continent of Europe. By Edward Hull, u.p., F.R.s., &e., Divector of the 
Geological Survey of Ireland, and Professor of Geology in the Royal College of 
Science, Dublin. Plates XXII. to XXXV. (November, 1882), 
20.—-Notes on the Physical Appearance of the Planet Mars during the Opeacition | in 1881. 
Accompanied by Sketches made at the Observatory, Birr Castle. By Otto Boeddicker, 
pip. Plates XXXVI and XXXVII. (December, 1882), 
21.—Notes on the Aspect of Mars in 1882. By OC. E. Burton, B.A., F.R.AS., as seen with a 
Reflecting Telescope of 9-inch Aperture, and Powers of 270 and 600. Plate 
XXXVIII. (January, 1883), F F ; c , 
2.On the Hnergy expended in Propelling a Bicycle. ‘By G. Johnstone Stoney, D.sc., 
F.R.8.,a Vice-President of the Society ; and G. Gerald Stoney. Plates XX XIX. 
to XLI. (January, 1883), 
23.—On Electromagnetic Effects due to the Motion of the Barth. By are Temas Fitz. 
gerald, M.A., F.1.C.D., Erasmus Smith’s Professor of Experimental Science in the’ 
University of Dublin. (January, 1883), 
24.On the Possibility of Originating Wave Dec in the Ether by Moats of 
Electric Forces :—Corrections and Additions. By George Francis Fitzgerald, M.a., 
F.T.C.D. (January, 1883), 6 : 5 : 
25,.—On the Fossil Fishes of the Carboniferous Limestone Series of Great Britain. By J. 
W. Davis. Plates XLII. to LXV. (September, 1883), 
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