SCIENTIFIC PROCEEDl^GS—oonlmue./. 



4. On a Pliytophthoi-a Parasitic on Apples which has both Amphigynous and 



Paragynous Antheridia; and on Allied Species which show the same 

 Phenomenon. By H. A. Laffekty and George H. Pethybridoe, Seeds 

 and Plant Disease Division, Department of Agriculture and Technical 

 Instruction for Ireland. (Plates I and II.) (June, 1922.) 



5. Some Further Notes on the Distribution of Activity in Radium Therapy. 



By H. H. PooLE, M.A., sc.D., Chief Scientific Officer, Royal Dublin Society. 

 (June, 1922.) 

 a. Prehminary Experiments on a Chemical Method of Separating the Isotopes 

 of Lead. By Thomas Dillon, d.sc. ; Rosalind Clarke, d.sc. ; and Victor 

 M. HiNCHY, B.sc. (Chemical Department, University College, Galwav) 

 (July, 1922.) " ^ JJ 



7. The Lignite of Washing Bay, Co. Tyrone. By T. Johnson, d.sc, f.l.s., 



Professor of Botany, Royal College of Science for Ireland ; and Jane G. 

 GiLMoRB, B.sc. (Plate III.) (August, 1922.) 



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. 

 GiLMoRB, B.sc (Plate IV.) (August, 1922.) 



9. The Electrical Design of A.C. High Tension Transmission Lines. By 



H. H. Jeffcott. (August, 1922.) 



10. The Occurrence of Helium in the Boiling Well at St. Edmundsbury, Lucan. 



By A. G. G. Leonard, f.r.csci., ph.d., f.i.c, and A. M. Richardson, 

 A.R.c.sci., a. I.e. (Plate V.) (August, 1922.) 



[Nos. 1 to 10, price 9?.] 



11. On the Detonating Action of a Particles. By H. H. Poole, m.a., sc.d., 



Chief Scientific Officer, Royal Dublin Society. (December, 1922.) 



12. The Variations of Milk Yield with the Cow's Age and the Length of the 



Lactation Period. By .James Wilson, m.a., b.so. (December, 1922.) 



13. A Note on Growth and the Transport of Organic Substances in Bitter 



Cassava {Mimihot utilissima). By T. G. Mason, m.a., b.sc (December, 

 1922.) 



[Nos. 11 to 13, price Is. Gd.'] 



14. The Action of the Oxides and the Oxyacids of Nitrogen on Diphenylurethane. 



By Hugh Ryan, d.sc, and Anue Donnellan, m.sc. University College, 

 Dublin. (February, 1923.) 



15. The Action of the Oxides and the Oxyacids of Nitrogen on Ethyl-o-Tolyl- 



urethane. By Hugh Ryan, d.sc, and Nicholas Collinane, ph.d., 

 University College, Dublin. (February, 1923.) 



16. The Action of the Oxides and the Oxyacids of Nitrogen on Ethyl-Phenyl- 



urethane. By Hugh Ryan, d.sc, and Anna Connolly, m.sc. University 

 College, Dublin. (February, 1923.) 



17. The Action of the Oxides and the Oxyacids of Nitrogen on Phenyl-Benzyl- 



urethane. By Hugh Ryan, d.sc, an^l James L. O'Donovan, ii.sc, 

 University College, Dublin. ■ (February, 1923.) 



18. The Action of the Oxides and the Oxyacids of Nitrogen on the Phenylureas. 



By Hugh Ry.an, d.sc, and Peter K. O'Toole, m.sc. University College, 

 Dublin. (February, 1923.) 



19. The Action of the O.-iides and the Oxyacids of Nitrogen on Phenyl-Methyl- 



urea. By Hugh Ryan, d.sc, and Michael J. Sweeney, m.sc. University 

 College, Dublin. (February, 1923.) 



[Nos. 14 to 19, price 4s.] 



20. On the Cause of Rolling in Potato Foliage ; and on some further Insect 



Carriers of the Leaf-roll Disease. By Paul A. Murphy, scd., a.r.csci.. 

 Seeds and Plant Disease Division, Department of Agriculture and Technical 

 Instruction for Ireland. (Plate VI.) (May, 1923.) 



21. On the Channels of Transport from the Storage Organs of the Seedlings of 



Lodoicea, Phoenix, and Vina. By Henry H. Dixon, scd., f.r.s., Professor 

 of Botany in the University of Dublin ; and Nigel G. Ball, m.a.. Assistant 

 to the Professor of Botany in the University of Dublin. (Plates VII-XI.) 

 (June, 1923.) 



22. Irregularities in the Rate of Solution of Oxygen by Water. By H. G. Becker, 



A.R.CSCI., A. I.e., Demonstrator in Chemistry in the College of Science, 

 Dublin; and E. P. Pearson, a.r.o.sci., Research Student. (June, 1923.) 



