SCIENTIFIC PROCEEDINGS— continued. 



21. Further Observations on the Cause of the Common Dry-Bot of the Potato- 



Tuber in the British Isles. By George H. Bethybridge. b.sc, ph.d., and 

 H. A. Lafferty. (Blates VI- VII.) (June, 1917.) Is. Qd. 



22. The Gymnosomatous Pteropoda of the Coasts of Ireland. By Anne L. Massy. 



(Plate VIII.) (July, 1917.) Is. 

 28. Spermolithus Devonicus, 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-XIV.) (August, 1917.) Is. Gd. 



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



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



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



A. G. G. Leonard, a.r.c.so.i., b.sc, ph.d., and P. Whelan, a.r.c.sci. 

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



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



K. J. Feely, a. r. c.sc. i. (March, 1918.) Gel. 



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



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



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



b.a., m.sc (Plates XVII-XV1II.) (August, 1918.) Is. 



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



(August, 1918.) Is. 



80. A Disease of Flax Seedlings caused by a species of Colletotrichum, and trans- 



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

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



81. The Determination of the Bate of Solution of Atmospheric Nitrogen and 



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

 H. G. Becker, a.r.c.sc.i. (Blate XXI.) (August, 1918.) Is. 



82. The Absorption of Water by Vulcanized Fibre and Erinoid on Exposure k> 



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

 R. G. Allen, b.sc (lond.), a.r.c.sc.i. (October, 1918.) Gd. 



83. The Twist and Magnetization of a Steel '.rube in a Spiral Magnetic Field. 



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



84. Mahogany, and the Becognition 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. 



85. A Disease of Tomato and other Plants caused by a New Species of Phytoph- 



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

 a.r.c.sc.i. (Plates XLV.-XLVII.) (February, 1919). Is. Gd. 



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



(Plates XLVHI.-XLVIIIa.) (April, 1919.) Is. 



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



Method. By Joseph Beilly, m.a., d.sc, f.r.c.sci., and Wilfred J. 

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

 88. 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.r. jiet. soc (Plate L.) (April, 1919.) Gd. 



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



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



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.r.c.sci. (Plates 

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



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



E. J. Sheehy, f.r.c.sci. (May, 1919.) Gd. 



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



E. J. Sheehy, f.r.c.sci. (May, 1919.) 6d. 



DUHLIN : PKINTKH AT THE UN1VKHS1TY FltKSH BY I'ONSONHY AND CUHB8. 



