THE 



SC 1 ENT I FlC P ROCEE DING S 



&F THK 



ROYAL DUBLIN SOCIETY. 



Vol. IVII, I.&., Nos. 1-10. AU&UST. 1922. 



1.— EXPERIMENTS ON THE ELECTRIFICATION PRODUCED BY BREAKINO 



UP WATER, WITH SPECIAL APPLICATION TO SIMPSON'S THEORY 



OF THE ELECTRICITY OF THUNDERSTORMS. By Pkofes.sor J. J. 



Nolan, M.A., D.Sc, and J. Enright, B.A., M.Sc, University College, Dublin. 

 2.— CATAPHORESIS OF AIR-BUBBLES IN VARIOUS LIQUIDS. By Thomas^ 



A. McLaughlin, M.Sc, A.Inst.P., University College, Galway. 

 3.— ON THE AERATION OF QUIESCEISTT COLUMNS OF D [STILLED WATER 



AND OF SOLUTIONS OF SODIUM CHLORIDE. By Profes.^or, W.- E., 



Adenet, A.R.C.Sc.L, D.Sc, F.I. C; Dr. A. G. G. Leonard, F.R.C.Sci.^' 



B.So., F.I.C. ; and A. Richardson, A.R.C.Sc.L, A.I.C, ■ ,:. > ' . ; n J;. • !:T 



4.— ON A PHYTOPHTHORA PARASITIC ON APPLES WHICH HAS ,:?0:pH j 



- AMPHIGYNOUS AND PARAGYNOUS ANTHERID^A ; AND ON ALLIED , 



SPECIES WHICH SHOW THE SAME PHENOMENON. 'By ' 'H."A.- 



LafeEety and George H. Pethybridge, Seeds stnd. Plant Disease ..Division, 



Depai'tmentof Agriculture and Technical Instruction for Ireland. .(Plates 1 and 11.) 

 5.— SOME FURTHER NOTES ON THE DISTRIBtlTION. OF ACTIVITY IN 



RADIUM THERAPY. By H. H. Poole, M.A., Sc.D., Chief Scienti^c- 



Officer, Royal Dublin Society. ' 



6.— PRELIMINARY EXPERIMENTS ON A CHEftnCAL METHOD OF 



SEPARATING THE ISOTOPES OF LEAD. By Thomas Dillon, D.Sc. ; 



Rosalind Clarke, D.Sc. ; and Victor M. Hinchy, B.Sc (Chemicail Department, 



University College, Galway). 

 7— THE LIGNITE OF WASHING BAY, 00. TYRONE. By T. Johnson, 



D.Sc, F.L.S., Professor of Botany, Royal College of Science for Ireland ; and 



Jane G. Gilmore, B.Sc. (Plate III.) 

 8.— LIBOCEDRUS AND ITS CONE IN THE IRISH TERTIARY. By T. 



Johnson, D.Sc, F.L.S., Professor of Botany, Royal College of Science for 



Ireland; and Jane G. Gilmore, B.Sc. (Plate IV.) 

 9.— THE ELECTRICAL DESIGN OF A.C. HIGH TENSION TRANSMISSION 



LINES. By H. H. Jeffcoii. 

 10.— THE OCCURRENCE OF HELIUM IN THE BOILING WELL AT ST. 



EDMUNDSBURY, LUC AN. By A. G. G. Leonard, F.R.a^^getfrrrPff.^.-;-...... 



F.LC, and A. M. Richardson, A.R.C.Sc.L, A.I.C. (Plate V^X^^*'^"'^"' "''•'•.v',' 



[Authors alone are responsible for all opinions expressed in ihijcGommunJfgiiQji^^ 



DUBLIN: \:'^ 



PUBLISHED BY THE BOYAL' DUBLIN SOeiETY' 



LICINSTEK BOUSIC, J)UliLlN. 



WILLIAMS AND NOEGATE, 

 \i, HENRIETTA STREET, COVENT GARDEN, LONDON, W.C. 2. 



1922. 



Price Nine Shillings. 



