SCI KliTl FlC PUOCr: !•; D l NGS—contmucd. 



17. Improvements in Equatorial Telescope Jloimtings. By Sik Howard Grubb, 



r.R.s. (Plates XVII.-XIX.) (March 26, 1912.) l.s. 



18. Variations in the Osmotic Pressure of the Sap of Ilex aquifoLium. By 



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

 1912.) U. 



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



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

 9, 1912.) 6d. 



20. Heterangium Mhernicum, 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 



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. Morrow, A.R.C.Sc.I. (Plate XXIV.) 

 (May 11, 1912.) Is. 

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

 (May 18, 1912.) U. 



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. Eecherches Experimentales sur 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 Jamks Wilson, m.a., b.sc. (December 18, 1912.) Is.Qcl, 



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



Organs. By Hrnry H. Dixon, sc.d., f.r.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.) 6fZ. 



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



M.A., B.E. (February 15, 1913.) Is. 

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

 B.E. (February 17, 1918.) M. 



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



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



34. On Bothrodendron (Gyclostignm) kiltorkense, Haughton, sp. By T. Johnson, 



D.sc, F.L.S. (March 20, 1913.) 2s. 

 55. On the Rotting of Potato Tubers by a new species of Phyfcophthora having a 

 method of Sexual Reproduction hitherto undescribed. By George H. 

 Pethybridge, Ph.D., B.Sc. (March 21, 1918.) 2s. Qd. 



DUBLIN: PKINTKI) AT THE UNIVKKSITY PRESS BY HONSONBV ANli GIBBS. 



