SCIENTIFIC FROGEEDmGS—contmued. 



17 Improvements in Equatorial Telescope Mountings. By Sir Howard Grubb, 

 r.R.s. (Plates XYII.-XIX.) (March 26, 1912.) Is. 



18. Variations in tlie Osmotic Pressure of the Sap of Ilex aquifolium. By 



Henry H. Dixon, sc.d., f.k.s., and W. E. G. Atkins, m.a., a.i.c. (April 9, 

 1912.) 6(1. 



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



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

 9, 1912.) U. 



20. Hetermifjium hibernicnm, sp. nov. : A Seed-bearing Heterangium from 



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 



XI. 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. Mokrow, a.e.c.sc.i. (Plate XXIV.) 

 (May 11, 1912.) Is. 



23. Award of the Boyle Medal to Sir Howard Grubb, f.r.s., April 16, 1912. 



(May 18, 1912.) 6rf. 



24. Notes on Dischidia rafflesiana, Wall., and Dischidia nummularia, Br. By 

 • ' a! F. G. Kerr, m.d.' (Plates XXV.-XXXI.) (September 30, 1912.) 2s. 



25. Recherches Experimentales su'r la Densite des Liquides en dessous de 0°. Par 



Jean Timmermans. (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. 6rf. 



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



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



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



Oro-ans. By Henry H. Dixon, sc.d., f.r.s., and W. E. 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 Earer Minerals. By Arnold L. Fletcher, 



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



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



B.E. (February 17, 1913.) 6d. 

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

 M.A. (Cantab.). (Plate XXXIV.) (February 21, 1913.) Is. 6-/. 



34. On Bothrodendroii {Cy dost if/ ma) IdUorliense, Haughton, sp. By T. Johnson, 



D.sc, f.l.s. (March 20, 1913.) 2s. 



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



method of Sexual Eeproduction hitherto undescribed. By George H.. 

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



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



of Oospores. By George H. Petiiybridge, ph.d., b.sc, and Paul A. 

 Murphy, a.r.c.sci. (Plates XLV, XLVI.) (March 26, 1913.) Is. Gd. 



DUBLIN: J-KINTKI) AT THE UN1VBR81TY PKliSS BY r<)N».).--iKV AND GIBKS. 



