SCIENTIFIC FROCEEDmGS— continued. 



19. Variations in tlie Osmotic Pressure of the Sap of tlie Leaves of Hedera helix. 



By Henky H. Dixon, sc.d., f.r.s., and W. E. G. Atkins, m.a., a.i.c. (April 

 9, 1912.) 6d. 



20. Heterangium Jiibernicum, sp. nov. : A Seed-bearing Heterangium froni 



County Cork. By T. Johnson, d.sc, f.l.s. (Plates XX. and XXI.) 

 (April 12, 1912.) Is. 



21. 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. By James H. 

 PoLLOK, D.sc. (Plates XXII. and XXIII.) (May 7, 1912.) Is. 



22. The Ultimate Lines of the Vacuum-tube Spectra of Manganese, Lead, Copper, 



and Lithium. By Genevieve V. Moeeow, a.r.o.sc.i. (Plate XXIV.) 

 (May 11, 1912.) Is. 



23. Award of the Boyle Medal to Sib Howakd Gkubb, f.k.s., April 16, 1912, 



(May 18, 1912.) 6d. 



24. Notes on Dischidia rajiesiana, Wall., and Dischidia immmularia. Be. By 



A. F. G. Keee, m.d. (Plates XXV.-XXXI.) (September 30, 1912.) 25. 



25. Eecherclies Experimentales sur la Densite des Liquides en dessous de 0°. Par 



Jean Timjiermans. (October 18, 1912.) 3s. 



26. Steady and Turbulent Motion in Gases. By John J. Dowling, m.a. (Plates 



XXXII. and XXXIII.) (November 16, 1912.) Is. M. 



27. Unsound Mendelian Developments, especially as regards the Presence and 



Absence Theory. By James Wilson, m.a., b.sc. (December 18, 1912.) Is. Qd. 



28. Osmotic Pressures in Plants. I. — Methods of Extracting Sap from Plant 



Organs. By Heney H. Dixon, sc.d., f.e.s., and W. R. G. Atkins, m.a., a.i.c 

 (February 8, 1913.) Is. 



29. Osmotic Pressures in Plants. II.— Cryoscopic and Conductivity Measurements 



on some Vegetable Saps. By Henry H. Dixon, sc.d., f.r.s., and W. R. G. 

 Atkins, m.a., a.i.c. (February 8, 1913.) Qd. 



30. A Method of Microscopic Measurement. By J. Joly, sc.d., f.r.s. (February 



7, 1913.) Qd. 



31. The Melting-Points of some of the Rarer Minerals. By Arnold L. Fletcher, 



m.a., b.e. (February 15, 1913.) Is. 



32. A Refined Method of obtaining Sublimates. By Arnold L. Fletcher, m.a., 



b.e. (February 17, 1913.) Qd. 

 83. On the Germination of the Seeds of some Dicotyledons. By J. Adams, 

 m.a. (Cantab.). (Plate XXXIV.) (February 21, 1913.) Is. 6^/. 



34. On Bothrodendron [Cydostiijma) Jdltorkense, Haughton, sp. By T. Johnson, 



D.sc, f.l.s. (Plates XXXV.-XLI.) (March 20, 1913.) 2s. 



35. On the Rotting of Potato Tubers by a new species of Phytophthora having a 



method of Sexual Reproduction hitherto undescribed. By George H. 

 Pethybeidge, PH.D., B.sc (Plates XLII.-XLIV.) (March 26, 1913.) 2s. Qd. 



36. On Pure Cultures of Phytophthora infestans De Bary, and the Development 



of Oospores. By Geobge H. Pethybeidge, ph.d., b.sc, and Paul A. 

 MuEPHY, A.R.csci. (Plates XLV, XLVI.) (March 26, 1913.) Is. Qd. 



37. Inter- Alternative as opposed to Coupled Mendelian Factors : A Solution of 



the Agoui,i-Black Colour in Rabbits. By James Wilson, m.a., b.sc. 

 (March 27, 1913.) Qd. 



38. Notes on Recent Pampa and other Formations in Patagonia. By E. G. Fenton. 



(Plate XLVII.) (May 15, 1913.) 6rf. 



DUBLIN: PRINTKI) AT THE UNIVERSITY VKEBS BY hONKONKY AKU OIKKS. 



