622 



Index. 



Improvements in Equatorial Telescope 



Mountings (GRaBB), 223. 

 Inheritance of the Dun Coat-Colour in 



Horses (Wilson), 184. 

 Inheritance of Milk-Yield in Cattle 



(Wilson), 89. 

 Inter-Alternative as opposed to Coupled 



Mendelian Factors : A Solution of the 



Agouti-Black Colour in Rabbits 



(^ViLSON), 589. 

 IsArchseopteris aPteridosperm ? (Johnson), 



114. 



Johnson (T.). Forbesin cancellata, gen. et 

 sp. nov. (Spenopteris, sp., Bailet), 177. 



Seleraiighim Hiberiiicum, sp. nov. : 



A Seed-bearing Heterangium from Co. 

 Cork, 247. 



Is Arohseopteris a Pteridosperm ? 



U4,, 



The Occurrence of Archeeopteris 



Tschermaki, Stiu', and of other Species 

 of Arohasopteris in Ireland, 137. 



On Bothrodendron {Cyclostiyma) 



kiltorkense, Haughton, sp., 500. 



A Seed-bearing Irish Pteridosperm, 



Crossotheca Honinghausi, Eidston 

 [Lyginodendron oldhainium, William- 

 son), 1. 



Joly (John). A Method of Microscopic 

 Measurement, 441. 



Radiant Matter, 73. 



Joly (John) and Louis B. Smxih. On the 

 Amount of Radium Emanation from the 

 Soil and its Escape into the Atmosphere, 

 148. 



Kerr (A. F. G.). Notes on Dischidia 

 riifflesiana, Wall, and Dischidia num- 

 mularia, Bk., 293. 



Lyons (William J.). A Method of Exact 

 Determination of the Continuous Change 

 in Absolute Density of a Substance, e.g. 

 Wax, in passing through its Fusion 

 Stage, 63. 



Mechanical Stress Magnetisation of Nickel 

 (Part II.), and the Subsidence of Tor- 

 sional Oscillations in Nickel and Iron 

 Wii-es when subjected to the Influence of 

 Longitudinal Magnetic Fields (Begtvn), 

 28. 



Melting-Points of some of the Rarer 

 Minerals (Fletchee), 443. 



Method of Exact Determination of the 

 Continiious Change in Absolute Density 

 of a substance, e.g. Wax, in passing 

 through its Fusion Stage (Lyons), 63. 



Method of Microscopic Measurement 

 (Joly), 441. 



Morrow (Uenevieve V.) On the Influence 

 of Self-induction on the Spark Spectra 

 of Certain Nou-Metallie Elements, 607. 



The Ultimate Lines of the Vacuum- 

 tube Spectra of Manganese, Lead, 

 Copper, and Lithium, 269. 



Notes on Dischidia rarffiesiana, Wall, and 

 Dischidia nuimmdaria, Be,. (Keee), 

 293. 



Occurrence of Archaopeteris Tschermaki, 

 Stur, and of other Species of Archa3op- 

 teris in Ireland (Johnson), 137. 



Osmotic Pressures in Plants. I.— Methods 

 of Extracting Sap from Plant Organs 

 (Dixon and Atkins), 422. 



II. — Cryoscopic and Conductivity 



Measurements on some Vegetable Saps 

 (DrxoN and Atkins), 434. 



Pethybridge (G. H.), Considerations and 

 Exi)eriments on the supposed Infection 

 of the Potato Crop Tvith the Blight 

 Fungus (Phytophthura infestans) hy 

 means of Mycelium derived directly 

 from the planted Tubers, 12. 



On the Rotting of Potato Tubers 



by a new species of Phytophthora 

 having a method of Sexual Reproduction 

 hitherto undescribed, 529. 



Pethybridge (G. H.) audPaul A. Murphy. 

 On Pure Cultures of Phytophthora in- 

 feslans De Bary, and the Development of 

 Oospores, 566. 



PoUok (James H.). On the Vacuum- 

 Tube Spectra of the Vapours of some 

 Metals and Metallic Chlorides. Part I — 

 Cadmium, Zinc, Thallium, Mercury, 

 Tin, Bismuth, Copper, Arsenic, Anti- 

 mony, and Aluminium, 202. 



On the Vacuum-tube Spectra of 



some Metals and Metallic Chlorides. 

 Part II. — Lead, Iron, Manganese, Nickel, 

 Cobalt, Chromium, Barium, Calcium, 

 Strontium, Magnesium, Potassium, 

 Sodium, and Lithium, 253. 



