CONTENTS OF VOL. XX. 



PAGE 



Peesident's Address, 1883 xi— xxvii 



Art. I. The Influence of Light on Bacteria, by Arthur Downes, 



M.D., and Thomas P. Blunt, M.A., F.C.S. .. 1—2 



II. The Influence of Light on Bacteria, by James Jamieson, 



M.D 2—6 



III. On the Caves Perforating Marble Deposits, Limestone 



Creek, by James Stirling, F.L.S 7 — 17 



IV. The Eocks of Noyang, by A. W. Howitt, F.G.S. . . 18—70 



V. On the Occurrence of Bacteria (Bacilli) in Living Plants, 



by T. S. Ralph, Esq 70—74 



VI. Modern Fireproof and Watertight Building Materials— 

 Traegerwellblech and Asphalt, by Peter Behrendt, 

 C.E 75-83 



VII. Incandescent Lamps for Surgical and Microscopical 



Purposes, by Robert E. Joseph, Esq. . . . . 84 — 87 



VIII. On Germs of Blennorrhagia, translated by Mr. Rudall, 

 F.R.C.S., from an Original Paper by Dr. Ecklund, 

 of Sweden 87 



IX. Notes on Hydrology, by G. R. B. Steane, Esq., C.E. . . 88—97 



X. Astronomical Notes, by R. L. J. Ellery, F.R.S. .. 98 



XI. On Iron Girders, by Professor Kernot, M.A. .. .. 98 



XII. Schone's New System of Sewage, by Mr. Blackett . . 98 



XIII. Notes on the Dressing of Tin Ore, by J. Cosmo Newbery, 



B.Sc 99-102 



XIV. Descriptions of New, or Little Known, Polyzoa (Part V), 



by P. H. MacGillivray, M.A, M.R.C.S., F.L.S. . . 103—113 



XV. Electric Lighting for Mines, by Mr. R. E. Joseph . . 114—117 



XVI. A New Form of Darkfield Illumination Micrometer, by 



R. L. J. Ellery, F.R.S 118 



XVII. Notes of an Interesting Fact in Connection with the 

 Early History of the Electric Telegraph, by Mr. 



Ellery, F.R.S 118—120 



XVIII. Notes on the Rainfall Map recently Issued by the 



Government of Victoria, by Mr. Ellery, F.R.S. . . 121—123 



XIX. The Return of the Pons Comet, by Mr. Ellery, F.R.S. 123 



XX. The Recent Red Sunsets, by Mr. Ellery, F.R.S. . . 124—125 



XXI. The First Discoverers of the New Hebrides, by Mr. A. 



Sutherland, M.A 125 



XXII. Descriptions of New, or Little Known, Polyzoa (Part 



VI), by P. H. MacGillivray, M.A., M.R.C.S., F.L.S. 126—128 



