SCIENTIFIC PROCEEDINGS— continued. 



15. On the Mode of Occurrence and Origin of the Orbicular Granite of Mullaghderg, 



Co. Donegal. By Gkenville A. J. Cole, m.r.i.a., f.g.s. (Plates IV-V.) 

 (October, 1916.) Is. 



16. An Abnormality in the Arterial System of the Babbit. By Edmond J. 



Sheehy, a.e.c.sc.i. (December, 1916.) 6d. 



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). Gd. 



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



Florence W. Kea, b.sc. (January, 1917.) 6d. 



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



1916. (January, 1917). Qd. 



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-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. Qd. 



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



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



23. Spermolithics 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. 6<f. 



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



