TRANSACTIONS (NEW SERIES). 
VOLUME I. 
(Recently Published.) 
PART. 
15.—Notes on the Physical Appearance of the Planet Jupiter during the Season 1880-1. By The 
EArt or Rosse and Dr. Orro BorppIcKER.—Plate XV. (January, 1882.) 
16.—Photographs of the Spark Spectra of Twenty-one Elementary Substances. By W. A. 
HARTLEY, F.RS.E., Professor of Chemistry, Royal College of Science, Dublin. Plates XVI, 
XVI. and XVIII. (February, 1882.) 
17.—Notes on the Physical Appearance of the Comets 6 and ¢, 1881, as observed at Birr Castle, 
Parsonstown, Ireland. By The EARL oF RosszE and OrTo BOEDDICKER, PH.D. Plate XIX. 
(August, 1882.) 
18.—On the Laurentian Rocks of Donegal, and of other parts of Ireland. By Epwarp Hutt, 
LLD., F.BS. &c., Director of the Geological Survey of Ireland. Plates XX. and XXI. 
(February, 1882.) 
19,—Paleo-Geological and Geographical Maps of the British Islands and the adjoining parts of the 
Continent of Europe. By EpwArp HULL, LL.D., r.RS. &e., Director 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 Ons in 1881. 
Accompanied by Sketches made at the Observatory, Birr Castle. By Orro BappickEr, Pu.D. 
With Plates XXXVI. and XXXVII. (December, 1882.) ay 
21.— Notes on the Aspect of Mars in 1882. By C. HE. BuRTON, B.A. E.R.A.S., as seen with a Reflecting 
Telescope of 9-inch Aperture, and Powers of 270 and 600. With Plate XXXVIII. (January, 
1883.) 
22.—On the Energy expended in Propelling a Bicycle. By G. J OHNSTONE STONEY, D.SC,, F.R.S., a 
Vice-President of the Society; and G. GERALD STonry. With Plates XXXIX., XL.,and XLT. 
(January, 1883.) 
23,—On Electromagnetic Effects due to the Motion of the Harth. By Grorcr Francis F ITZGERALD, 
M.A;, F.1.0.D., Erasmus Smith’s Professor of Experimental Soe in the University of Dublin. 
(January, 1883.) 
24.—On the Possibility of Originating Wave ‘Diisinnyemees in the Hither by Men of Electric 
Forces :—Corrections and Additions. By GrorGr FRANCIS FitzGERALD, M.A., F.1.C.D. 
(January, 1883.) : 
VOLUME IL. (complete.) 
1.—Observations of Nebulze and Clusters of Stars, made with the Six-foot and Three-foot Reflectors 
at Birr Castle, from the year 1848 up to the year 1878. Nos.1&2. By the Ricur Hon. 
THE HARL OF ROSSE, LL.D., D.C.L., F.RS. Plates 1. to TV. (August, 1879.) No, 8. Plates V. 
and VI. (June, 1880.) 
2—On Aquatic Carnivorous Coleoptera or Dytiscide, By Dr. SHarp. Plates VII. to XVIII, 
(April, 1882.) es 
