_ TRANSACTIONS (NEW SERIES). 
VOLUME L. 
(Recently Published.) 
PART. 
9,— Places of One Thousand Stars observed at the Armagh Observatory. By Rey. THomAS ROMNEY 
ROBINSON, D.D., LL.D., D.GL., F.RS., &C. (February, 1879.) 
10.—On the Possibility of Originating Wave Disturbances in the Ether by Means of Electric Forces. 
By Gzo. Fras. FITZGERALD, M.A., F.1.0.D. Part 1. (February, 1880.) 
11.—On the Relations of the Carboniferous, Devonian, and Upper Silurian Rocks of the South of 
Ireland to those of North Devon. By Epwarp HULL, M.A., LL.D., F.RS. Director of the 
Geological Survey of Ireland, and Professor of Geology, Royal College of Science, Dublin. 
Plates IV. and V., and Woodcuts. (May, 1880.) 
12,—Physical Observations of Mars, 1879-80. By C. H. BURTON, B.A., M.R.LA,, F.R.AS. Plates VI., 
VIL, and VIII. (May, 1880.) 
13.-—On the Possibility of originating Wave Disturbances in the Ether by means of Electric Forces. 
Part 2. By Gro. FRANCIS FITZGERALD, M.A., F.1.0.D. (November, 1880.) 
14,.—Explorations in the Bone Cave of Ballynamintra, near Cappagh, County Waterford. By A. 
LerrH ADAMS, M.B., LLD., F.B.S., F.G.S8. G,H. KINAHAN,M.R.1.A. and R. J. UssHer. Plates IX. 
to XIV. (April, 1881.) 
15.—Notes on the Physical Appearance of the Planet Jupiter during the Season 1880-1. By The 
EARL OF Rossz and Dr. Orro BoEDDICKER.—Plate XV. (January, 1882.) 
16.—Photographs of the Spark Spectra of Twenty-one Elementary Substances. By W. A. 
HARTLEY, F.R.8.E., Professor of Chemistry, Royal College of Science, Dublin. Plates XVI, 
XVII. 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 RossE and Orro BoEDDICKER, PH.D, Plate XIX. 
(August, 1882.) 
18.—On the Laurentian Rocks of Donegal, and of other parts of Ireland, By EKpwarp HULL, 
LLD., F.RS. &c, Director of the Geological Survey of Ireland. Plates XX. and XXI. 
(February, 1882.) 
19,—Palzeo-Geological and Geographical Maps of the British Islands and the adjoining parts of the 
Continent of Europe. By Epwarp HULL, LL.D., RS. W&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 Opposition in 1881. 
Accompanied by Sketches made at the Observatory, Birr Castle. By Orro BappicKEr, Pu.D. 
With Plates XXXVI. and XXXVII. (December, 1882.) 
21.—Notes on the Aspect of Mars in 1882. By C. E. BuRTON, B.A., F.R.A.S., as seen with a Reflecting 
- Telescope of 9-inch Aperture, and Powers of 270 and 600. With Plate XXXVIII. (January, 
1883.) 
VOLUME II. (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 Ricut Hon. 
THE HARL OF ROSSE, LL.D., D.C.L., F.RS. Plates I. toTV. (August, 1879.) No. 3. Plates V. 
and VI. (June, 1880.) 
2,—On Aquatic Carnivorous Coleoptera or Dytiscide. By Dr. Smarr, Plates VII. to XVIIL 
(April, 1882.) 
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