SCIENTIFIC PROCEEDINGS. 



VOLUME XIII. 



1. A Seed-BeaL-in? Irish Pteridosperin, Grossotheca Rdnlnglmicsi, Kidston 



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

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



2. Gousiderafcioas aad Experiments on the sapposed Infection of the Potato Crop 



with the Blight Faagus {Phi/tophthora infestans) by means of Mycelium 

 derived directly from the planted Tubers. By George H. Pethtbrid&e, 

 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 Brown, b.so. 

 (April 15, 1911). Is. 



4. A Tliermo-Eleetric Method of Oryoscopy. 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.r.c.so. (lond.). (May 16, 1911). Gd. 



6. Eadiaut 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 ArchfBopteris a Pteridosperm ? By T. Johnson, d.so., f.l.s. (Plates 



IV.-VL) (.June 28, 1911.) Is. Gd. 



9. The Occurrence of Arehaopteris Tscliermaki, Stur, and of other Species of 



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

 (June 28, 1911.) Is. 



10. Award of the Boyle Medal to Propkssor -John Joly, m.a., sc.d., f.r.s. (July, 



1911.) 6rf. 



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



Atmosphere. By John Joly, sc.d., f.r.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 Arber, .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 Goat-Colour in Horses. By James Wilson, m.a., b.sc 



(January, 1912.) Is. 



15. On the Vacuum Tube Spectra of the Vapours of some Metals and Metallic 



Chlorides. Part I. — Cadmium, Zinc, Thallium, Mercury, Tin, Bismuth, 

 Copper, Arsenic, Antimony, and Aluminium. By James H. Pollok, d.sc 

 (Plates XV. and XVI.) (February 21, 1912.) Is. 



