SCIENTIFIC PROCEEDINGS— continued. 



17. The Fatigue of Nickel and Iron Wires when subjected to the Influence 



of Transverse Alternating Magnetic Fields. By William Brown, b.sc. 

 (January, 1917). 6d. 



18. The Chemistry of Foul Mud Deposits. By E. A. Letts, d.sc, &c, and 



Florence W. Rea, b.sc. (January, 1917.) Gd. 



19. Award of the Boyle Medal to Professor Henry Horatio Dixon, sen., f.r.s., 



1916. (January, 1917). Gd. 



20. The Change in Young's Modulus of Nickel with Magnetic Fields. By 



William Brown, b.sc. April, 1917. 6d. 



21. Further Observations on the Cause of the Common Dry-Rot of the Potato 



. Tuber in the British Isles. By George H. Pethybridge. b.sc, ph.d., and 

 H. A. Lafferty. (Plates VI- VII.) (June, 1917.) Is. Qd. 



22. The Gymnosomatous Pteropoda of the Coasts of Ireland. By Anne L. Massy. 



(Plate VIII.) (July, 1917.) Is. 

 28. SpermoKthus Devonicus, gen. et sp. nov., and other Pteridosperms from the 

 Upper Devonian Beds at Kiltorean, Co. Kilkenny. By Thomas Johnson, 

 d.sc, f.l.s. (Plates IX-XIV.) (August, 1917.) Is. 6d. 



24. The Genus Taenitis, with some Notes on the remaining Taenitidinae. By 



Elizabeth J. Leonard, m.sc. (Plate XV.) (February, 1918). Is. 



25. The Quantitative Spectra of Lithium, Rubidium, Caesium, and Gold. By 



A. G. G. Leonard, a.r.csci., b.sc, ph.d., and P. Whelan, a.r.c.sci. 

 (Plate XVI.) (February, 1918.) 6rf. 



26. The Polarisation of a Leclanche Cell. By Felix E. Hackett, ph.d., and 



E. J. Feely, a.r.csci. (March, 1918.) 6d. 



27. The Electrical Resistance of Porcelain at Different Temperatures. By R. G. 



Allen, b.sc, lond. ; a.r.csci. (June, 1918.) Is. 



28. Observations on the Morphology of Larix leptolepis. By Joseph Doyle, 



b.a., m.sc (Plates XVII-XVlII.) (August, 1918.) Is. 



29. The Insulating Properties of Erinoid. By R. G. Allen, b.sc (lond.), a.r.csci. 



(August, 1918.) Is. 



30. A Disease of Flax Seedlings caused by a species of ColletotricJmm, and trans- 



mitted by Infected Seed. By George H. Pethybridge, b.sc, ph.d., and 

 H. A. Lafferty, a.r.csci. (Plates XIX-XX.) (August, 1918.) Is. Gd. 



81. The Determination of the Rate of Solution of Atmospheric Nitrogen and 

 Oxygen by Water. Part I. By W; E. Adeney, d.sc, a.r.c.sci., f.i.c, and 

 H. G. Becker, a.r.csci. (Plate XXI.) (August, 1918.) Is. 



32, The Absorption of Water bv Vulcanized Fibre and Erinoid on Exposure to 

 Moist Air, and the consequent change of Electrical Resistance. By 

 R. G. Allen, b.sc (lond.), a.r.csci. (October, 1918.) 6d. 



83. The Twist and Magnetization of a Steel Tube in a Spiral Magnetic Field. 

 By F. E. Hackett, m.a., ph.d. (October, 1918). 6c/. 



34. Mahogany, and the Recognition of some of the Different Kinds by their Micro- 



scopic Characteristics. By Henry H. Dixon, scd., f.r.s. (Plates XXII.- 

 XLIV.) (December, 1918.) 4s. 6rf. 



35. A Disease of Tomato and other Plants caused by a New Species of Phytoph- 



thora. By George H. Pethybridge, b.sc, ph.d., and H. A. Lafferty, 

 a.r.csci. (Plates XLV.-XLVII.) (February, 1919). Is. 6d. 



DUBLIN : PRINTED AT THE UNIVERSITY PRESS BY PONSONRY AND GIBBS. 



