SCIENTIFIC TROC^^BmGS— continued. 



17. Improvements in Equatorial Telescope Mountings. By Sie Howard Gkubb, 



F.R.s. (Plates XVII.-XIX.) (March 26, 1912.) Is. 



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



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

 1912.) 6d. 



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



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

 9, 1912.) Qd. 



20. Heterangium Idbernicum, 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.E.C.Sc.I. (Plate XXIV.) 

 (May 11, 1912.) Is. 



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



(May 18, 1912.) M. 



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.) 8s. 



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



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



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



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



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



Organs. By Henry H. Dixon, sc.d., f.r.s., andW. 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. E. G. 

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

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

 7, 1913.) M. 



31. The Meltiug-Points of some of the Barer Minerals. By Arnold L. Fletcher, 



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



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



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



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



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



34. On Bothrodendron {Cycloatirjma) Idltorlcense, Haughton, sp. By T. Johnson, 



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



DUBLIN : PKlNTKIi AT THE UNIVKRSITY PRl^ISS BY FONSONKY ANlJ OIHlSS. 



