SCIENTIFIC PROCEEDINGS. 



VOLUME XIII. 



1. A Sesd-Baai'ing Ii-ish Pfceridospecm, Crossotheca Hoiiinghausi, Kidston 



{Lyginodondron oldhamium, Williamson). ]By T. Johnson, d.sc, f.l.s. 

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



2. Oonsiderafcioas and Expsritnants oa the supposed Infeotioii of the Potato Crop 



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

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

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



8. 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 Brown, b.sc. 

 (April 15, 1911). Is. 



4. A TJiermo-Electric Method of Cryoscopy. By Henry H. Dixon, sc.d., f.r.s. 



(April 20, 1911). Is. 



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



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

 By William J. Lyons, b.a., a.e.c.sc. (lond.). (May 16, 1911). Qd. 



6. Radiant Matter. By John Joly, so.d., p.e.s. (June 9, 1911.) Is. 



7. The Inheritance of Milk-Yield in Cattle. By James Wilson, m.a., b.sc. 



(June 12, 1911.) Is. 



8. Is Archieopteris a Pteridosperm ? By T. Johnson, d.sc, f.l.s. (Plates 



IV.-VI.) (June 28, 1911.) Is. 6d. 



9. The Occurrence of Archmopteris Tschennaki, Stur, and of other Species of 



Archfeopteris in Ireland. By T. Johnson, d.sc, f.l.s. (Plates VII., VIII.) 

 (June 28, .1911.) Is. 



10. Award of the Boyle Medal to Pbofessoe John Joly, m.a., so.d., f.k.s. (July, 



1911.) U. 



11. On the Amount of Eadium Emanation in the Soil and its Escape into the 



Atmosphere. By John Joly, so.d., f.k.s., and Lodis B. Smyth, b.a. 

 (Plate IX.) (August, 1911.) Is. 



12. Contributions to our Knowledge of the Floras of the Irish Carboniferous 



Eocks.^ By E. A. Newell Aebee, m.a., f.l.s. f.g.s. (January, 

 1912.) Is. 



13. Forbesia cancellata, gen. et sp. nov. (Sphenopteris, sp., Baily.) By 



T. Johnson, d.sc, f.l.s. (Plates XIII. and XIV.) (January, 1912, Is. 



