SCIENTIFIC PROCEEDINGS— continued. 



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



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



19. Award of the Boyle Medal to Professor Henry Horatio Dixon, so.d., 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. Gd. 



21. Further Observations on the Cause of the Common Dry-Bot 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. Gd. 



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



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



23. Sperviolithus Bevonicus, gen. et sp. nov., and other Pteridosperms from the 



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

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



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, Bubidium, Caesium, and Gold. By 



A. G. G. Leonard, a.r.csc.i., b.sc, ph.d., and P. Whelan, a.r.o.sci. 

 (Plate XVI.) (February, 1918.) Gd. 



26. The Polarisation of a Leclanch6 Cell. By Felix E. Haokett, ph.d., and 



B. J. Feely, a.r.csc.i. (March, 1918.) 6rf. 



27. The Electrical Besistance of Porcelain at Different Temperatures. By B. G. 



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



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



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



29. The Insulating Properties of Erinoid. By B. G. Allen, b.sc. (lond.), a.r.csc.i. 



(August, 1918.) Is. 



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



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

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



31. The Determination of the Bate of Solution of Atmospheric Nitrogen and 



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

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



32. The Absorption of Water by Vulcanized Fibre and Erinoid on Exposure to 



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

 B. G. Allen, b.sc (lond.), a.r.csc.i. (October, 1918.) 6^. 



33. The Twist and Magnetization of a Steel '.rube in a Spiral Magnetic Field. 



By F. E. Hackett, m.a., ph.d. (October, 1918). Gd. 



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



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

 XLIV.) (December, 1918.) 4s. Gd. 



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.csc.i. (Plates XLV.-XLVII.) (February, 1919). Is. Gd. 



36. Exudation of Water by Golocasia Antiquorum. By Margaret G. Flood, b.a. 



(Plates XLVIII.-XLVIIIa.) (April, 1919.) Is. 



DUBLIN : PRINTED AT THE UNIVERSITY PRESS BY PONSON11Y AND GTBBS. 



