vi List of the Gontrihutors. 



Fitzgerald, George Francis, Fellow of Trinity College, Dublin, page 

 and Erasmus Smith's Professor of Natural and Experimental 

 PMlosopliy in the University of Dublin. 



Note on Mr. J. J. Thomson's Investigation of the Electro- 

 Magnetic Action of a Moving Electrified Sphere, . 250 



On Comets' Tails, 344 



Freke, Percy Evans. 



North -American Birds crossing the Atlantic, . . . 22 

 On Birds observed in Amelia County, Yirginia, . . 61 



Grubb, Howard. (See Burton, Charles E.) 



Hardman, Edward T,, F.C.S. 



On a Travertine from Ballisodare, near Sligo, containing 



a considerable amount of Strontium, . . . . 12 



Hardman, Edward T., F.C.S., and Professor Hull, LL.D.,F.R.S. 



On the Metam Orphic Rocks of Cos, Sligo and Leitrim, 

 and the enclosed Minerals, with Analysis of Serpentine, 

 and Microscopical Notes on the Serpentine, &c. Plate 33, 357 



Hartley, W. N., F.R.S.E., &c.. Professor of Chemistry, Royal 

 College of Science, Dublin. 



Description of the Instruments and Processes employed 

 in Photographing Ultra- Yiolet Spectra. Plates 12, 13, 

 14, and 15, 93 



HuGGiNS, William, D.C.L., F.R.S., &c. 



Photographic Spectrum of Comet, . . . . .150 



Hull, Edward, LL.D,, F.R.S., Director of the Geological 

 Survey of Ireland. 



On the Geological Structure of the Northern Highlands 

 of Scotland ; being Notes of a Recent Tour. Plates, 9, 

 10, and 11, 34 



On the recent remarkable Subsidences of the Ground in 



the Salt Districts of Cheshire, 133 



(See also Hardman, Edward). 



