SCIENTIFIC PROCEEDINGS. 



VOLUME XIII. 



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



{Lyginodendron oldhamium, Williamson). By T. Johnson, d.sc, p.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 injestans) by means of Mycelium 

 derived directly from the planted Tubers. By George H.; Pethybridgb, 

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



3. 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 Henry H, Dixon, so.d., f.b.s. 



(April 20, 1911). Is. 



5. A Method of Exact Determination of the Continuous Change in Absolute 



Density of a Substance, e.g. Wax, in passing through its Fusion Stage. 

 By William J. Lyons, b.a., a.r.o.so. (lond). (May 16, 1911). Qd, 



DUBLIN : PRINTED AT THE UNIVERSITY PRESS BY I'ONSONBY AND OIBBS. 



