Contents. 
XXIX.— Deposits of unbroken Marine Shells at High Levels in the Carraun 
Peninsula, County aa or T. E. Gorpon, M.B., and A. F. 
Drxon, Se. Dos 6 ‘ : : 5 : : : 
XXX.—Curious Water-worn Markings on Rocks at Dooghbeg, Co. Mayo. 
By T. E. Goxpon, M.B. , and A. F. Dixon, Sc.D., : 
XXXI.—On the Quantitative Spark-Spectra of Titanium, Uranium, and 
Vanadium. By James H. Pottox, D.Sc., ovale College of 
Science, Dublin. (Plates XXV.-XXVI.), 
XXXII.—On the Spectrographic Analysis of a Specimen of Commercial 
Thallium. By James H. Pottox, D.Sc., Royal College of 
Science, Dublin. (Plate XXVII.), : : P z : 
INDEX, 
ERRATA. 
On front of leaf facing Plate 1V. (p. 88), for ‘‘ Explanation of Plate VI.’’ 
‘“« Explanation of Plate IV.”’ 
In Explanation of Plate VI. (p. 136), under Fig. 2, for ‘colouration ”’ 
““ coloration ”’ 
325 
328 
dol 
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