SCIENTIFIC PROCEEDINGS— continued. 



23. Spermolithus Bevonicus, gen. et sp. nov., and other Pteridosperms from the 



Upper Devonian Beds at Kiltorcan, Co. Kilkenny. By Thomas Johnson, 

 d.sc, f.l.s. (Plates IX-X1V.) (August, 1917.) Is. Qd. 



24. The Genus Taenitis, with some Notes on the remaining Taenitidinae. By 



Elizabeth J. Leonard, m.so. (Plate XV.) (February, 1918). Is. 



25. The Quantitative Spectra of Lithium, Rubidium, Caesium, and Gold. By 



A. G. G. Leonakd, a.r.c.sci., b.sc, ph.d., and P. Wbelan, a.r.c.sci. 

 (Plate XVI.) (February, 1918.) Qd. 



26. The Polarisation of a Leclanche Cell. By Felix E. Hackett, ph.d., and 



B. J. Feely, a.e.c.sc.i. (Marcl), 1918.) Qd. 



27. The Electrical Resistance of Porcelain at Different Temperatures. By R. G. 



Allen, b.sc, lond. ; a.e.c.sc.i. (June, 1918.) Is. 



28. Observations on the Morphology of Larix leptolepis. By Joseph Doyle, 



b.a., m.sc. (Plates XV1I-XVIII.) (August, 1918.) Is. 



29. The Insulating Properties of Erinoid. By R. G. Allen, b.sc. (lond.), a.e.c.sc.i. 



(August, 1918.) Is. 



30. A Disease of Flax Seedlings caused by a species of Colletotriclium, and trans- 



mitted by Infected Seed. By George H. Pethybridge, b.sc, ph.d., and 

 H. A. Lafferty, a.r.c.sci. (Plates XIX-XX.) (August, 1918.) Is. Qd. 



31. The Determination of the Rate of Solution of Atmospheric Nitrogen and 



Oxygen by Water. Part I. By W. E. Adeney, d.sc, a.r.c.sci., f.i.c, and 

 H. G. Becker, a.r.c.sci. (Plate XXI.) (August, 1918.) Is. 



32. The Absorption of Water by Vulcanized Fibre and Erinoid on Exposure to 



Moist Air, and the consequent change of Electrical Resistance. By 

 R. G. Allen, b.sc (lond.), a.r.c.sci. (October, 1918.) Qd. 



33. The Twist and Magnetization of a Steel Tube in a Spiral Magnetic Field. 



By F. E. Hackett, m.a., ph.d. (October, 1918). Qd. 



34. Mahogany, and the Recognition of some of the Different Kinds by their Micro- 



scopic Characteristics. By Henry H. Dixon, scd., f.r.s. (Plates XXII.- 

 XLIV.) (December, 1918.) 4s. Qd. 



35. A Disease of Tomato and other Plants caused by a New Species of Pbytoph- 



thora. By George H. Pethybridge, b.sc, ph.d., and H. A. Lafferty, 

 a.r.c.sci. (Plates XLV.-XLVII.) (February, 1919). Is. Qd. 



36. Exudation of Water by Colocasia Antiquoncm. By Margaret G. Flood, b.a. 



(Plates XLVIII.-XLVIHa.) (April, 1919.) Is. 



37. The Determination of the Volatile Fatty Acids by an Improved Distillation 



Method. By Joseph Reilly, m.a., d.sc, f.r.csci., and Wilfred J. 

 Hickinbottom. (Plate XLIX.) (April, 1919.) Is. 



38. Solar Halos seen at Greystones, Co. Wicklow, on September 22nd, 1879 ; and 



in Texas and Ohio, U.S.A., on October 3rd, 1917. By Sir John Moore, 

 m.a., m.d., d.sc, f.e. wet. soc (Plate L.) (April, 1919.) Qd. 



39. Two New Species of Collembola from Nyassaland. By Geoege H. Carpenter, 



d.sc, m.r.i.a. (Plate LI.) (April, 1919.) Qd. 



40. An Economic Method of Determining the Average Percentage of Fat in a 



Cow's Milk for a Lactation Period. By E. J. Sheehy, f.e.c.sc.i. (Plates 

 LII.-LIII.) (May, 1919.) Is. 



41. The Comparative Variation of the Constituent Substances of Cows' Milk. By 



E. J. Sheehy, f.r.csci. (May, 1919.) Qd. 



42. Possible Causes of Variation in the Quantity and Quality of Cows' Milk. By 



E. J. Sheehy, f.r.csci. (May, 1919.) Qd. 



43. The System n-Butyl Alcohol-Acetone-Water. By Joseph Reilly, m.a., d.sc, 



f.r.csci., and Edgar W. Ralph. (June, 1919.) Qd. 



44. The Determination of the Rate of Solution of Atmospheric Nitrogen and 



Oxygen by Water. Part II. By W. E. Adeney, d.sc, a.r.c.sci., f.i.c, 

 and H. G. Becker, a.r.c.sci. (September, 1919.) Is. 



45. An Analysis of the Palaeozoic Floor of North-East Ireland, with Predictions as 



to Concealed Coal-fields. By W. B. Wright, b.a., f.g.s. (Plate LIV.— 

 Map.) (September, 1919.) Is. Qd. 



46. On some Factors affecting the Concentration of Electrolytes in the Leaf-sap 



of Syringa vulgaris. By T. G. Mason, scb., m.a. (December, 1919.) Is. 



D'JHIiIN : PKINTB1) AT THE UNIVERSITY P11ESS }iV 1'ONSONIIY AND OIHBS. 



