SCIENTIFIC FROGEEDmGS— continued. 



17. A Sensitive Valve Method for the Measurement of Capacity, with some- 



Important Applications. By John J. Dowling, m.a., f.inst.p. (February, 

 1921.) 6rf. 



18. A Direct Reading Ultra-Micrometer. By .John J. Dowling, m.a., m.e.i.a., 



F.INST.P. (March, 1921.) 6d. 



19. Studies in the Physiography and Glacial Geology of Southern Patagonia. By 



E. G. Fenton. (Plates V, VI, and VII.) (March, 1921.) 4.^. 6d. 



20. Award of the Boyle Medal to Geoege H. Pethyj!Kidge, b.sc, ph.d., 1921. 



(March, 1921). Is. 



21. The Concentration and Purification of Alcoholic Fermentation Liquors. 



Part I.— The Distillation in Steam of certain Alcohols. By Joseph Reilly, 

 M.A., D.sc, M.R.I. A., F.I.C., and Wilfred J. Hickinbottom, m.sc, a.i.c. 

 (August, 1921.) 



22. The "Browning" and " Stem-Break" Disease of Cultivated Flax {Liniim 



vdtathsimum), caused by Polyspora lini n. gen. et sp. By H. A. Laffeeiy, 

 A.R.c.sc.i., Assistant in the Seeds and Plant Disease Division, Department 

 of Agriculture and Technical Instruction for Ireland. [Communicated by 

 Dr. George H. Petliybridge, b.sc] (Plates VIII-X.) (August, 1921.) 



23. A New Principle in Blowpipe Construction. By H. G. Becker, a.e.c.sc.i., 



A.I.O., Demonstrator in the Royal College of Science, Dublin. (August, 

 1921.) 



24. Uncharged Nuclei produced in Moist Air by Ultra- Violet Light aad other 



Soiirces. By the late Prof. J. A. McClelland, f.e.s., and J. J. M'Heney, 

 M.sc, University College, Dublin. (August, 1921.) 



[Nos. 21 to 24, price 7s.] 



25. Biological Studies of Aphis rumicis L. A. — Appearance of Winged Forms. 



B. — Appearance of Sexual Forms. By J. Davidson, d.sc. From the 

 Entomological Department, Institute of Plant Pathology, Rothamsted 

 Experimental Station, Harpenden, Herts. [Communicated by Professor 

 G. H. Carpenter.] (August, 1921.) 



26. The Occurrence of Dewalquea in the Coal-Bore at Washing Bay. By 



T. Johnson, d.sc, f.l.s.. Professor of Botany, Royal College of Science for 

 Ireland, and Jane G. Gilmoee, b.sc (Plates XI, XII.) (August, 1921.) 



27. A Simple Form of Apparatus for observing the Rate of Reaction between 



Gases and Liquids, and its use in determining the Rate of Solution of 

 Oxygen by Water under different conditions of Mixing. By H. G. Becker, 

 A.R.C.SC.I., A. I.e., Demonstrator in Chemistry, Royal College of Science, 

 Dublin. (August, 1921.) 



28. The Occurrence of a Sequoia at Washing Bay. By T. Johnson, d.sc, f.l.s., 



Professor of Botany, Eoyal College of Science for Ireland, and Jane G. 

 Gilmore, b.sc (Plates XIII, XIV.) (August, 1921.) ' 



29. The Sources of Infection of Potato Tubers with the Blight Fungus, 



Phytophtliora ivfestam. By Paul A. Murphy, b.a., a.e.c.sc.i., Assistant 

 in the Seeds and Plant Disease Division, Department of Agriculture and 

 Technical Instruction for Ireland. (August, 1921.) 



[Nos. 25 to 29, price 6s. 6(/.] 



OUHI.IN : CKINTRIi AT TH R UNIVRUeiTV PHRMS BV I'ON.SONMV AND OtHRS. 



