SCIENTIFIC PROCEEDINaS. 



VOLUME XIII. 



1. A Seed-Bearing Irish Pteridosperm, Grossotheoa, Honinghausi, Kidston 



[Lyginodendron oldhamium, Williamson). By T. Johnson, d.sc, f.l.s.. 

 (Plates I.-III.) (March, 1911.) Is. 



2. Considerations and Experiments on the supposed Infection of the] Potato Crop 



with the Blight Fungus {Phytophthora infestans) by means of Mycelium 

 derived directly from the planted Tubers. By George H. Pethybridge, 

 B.sc, PH.D. (March, 1911.) Is. 



S. Mechanical Stress and Magnetisation of Nickel (Part II.), and the Subsidence 

 of Torsional Oscillations in Nickel and Iron Wires when subjected to the 

 Influence of Longitudinal Magnetic Fields. By William Beown, b.so. 

 (April 15, 1911). Is. 



4. A Thermo-Electric Method of Cryoscopy. By Henky H. Dixon, so.d., p.r.s. 

 (April 20, 1911). Is. 



DUBLIN : PRINTED AT THE UNIVEHSITV PRESS BY PONSONBV AND aiBBS. 



