SCIENTIFIC PROCEEDlNaS. 



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. Coasiderations and Experiiuents on the supposed Infection of the Potato Crop 



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

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

 B.sc, 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 Bkown, b.so. 

 (April 15, 1911). Is. 



4. A Thermo-Electric Method of Oryoscopy. By Henry H. Dixon, so.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, in passing through its Fusion Stage. 

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



6. Radiant Matter. By John .Joly, sc.d., f.r.s. (June 9, 1911.) Is. 



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



(June 12, 1911.) Is. 



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



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



9. The Occurrence of AreluBoptens Tschermaki, Stur, and of other Species of 



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

 (June 28, 1911.) Is. 



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



1911.) Qd. 



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



Atmosphere. By John Joly, scd., f.k.s., and Lonis B. Smyth, b.a. 

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



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



Rocks. By E. A. Newell Aebeb, 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. 



14. The Inheritance of the Dun Coat-Colour in Horses. By James Wilson, m.a., b.so. 



(January, 1912.) Is. 



IIUBLIN : PRINTED AT CHE UNITEKStTY PRIiSS BY l-ONSONBY A"<U GIBBS. 



