Contents. 



XVII. A Proposition for the Improvement and Extension 

 of the Wharfage Accommodation on the Yarra 

 Kiver, by M. Adolphe Caeandal, C.E. France 47 



XVIII. On Colonial Timber Trees, and some European 

 Trees, which have been proved to be suitable 

 to the Colony of Victoria, by F. C. Christy, 

 Esq., C.E 47—56 



XIX. On the late Exceptional Season and frequency 



of Auroras, by E. L. J. Elleby, Esq. . . . . 56 — 64 



XX. On a New Form of Spectroscope, by E. L. J. 



Ellery, Esq. . . . . . . . . . . 64 



XXI. Some Notes of Observation with the Melbourne 



Great Telescope, by Farib Macgeorge, Esq. . . 65 — 71 



XXII. Notes on Enhydros found at Beechworth, by 



George Fooed, Esq. .. .. .. .. 71 — 76 



XXm. On a Self-acting Hydrostatic Chime and Clock- 

 weight, by A. K. Smith, Esq., C.E., M.E.S.S.A. 76—78 



XXIV. On Gun Cotton as an Explosive Agent, by E. L. J. 



Ellery, Esq., F.E.C.S 78 



XXV. On some Hydraulic Clock Weights, by F. 



Macgeorge, Esq. . . . . . . . . . . 79 



XXVI. Suggestions for the Improvement of the Mariner's 



Compass, by E. J. White, Esq. . . . . . . 79 — 80 



XXVn. On a Direction Eain Gauge, by Professor Wilson 81 



XXVin. A Method for the Manufacture of Chloride of 

 Aluminum and Calcium, for use as a Disin- 

 fectant, by J. Cosmo Newbery, Esq. . , . . 81 



XXIX. Ocean Waves and their Action on Floating 



Bodies, by S. E. Deverell, Esq. . . . . 82 — 99 



XXX. On a Linear Method of Finding the Stabihty of 



Ships, by E. K. HoRNE, Esq 99 



XXXI. Abstract of a Paper on Aboriginal Art in Austral- 

 asia, Polynesia, and Oceanica, and its Decay, 

 by H. E. Pain, Esq •• .. 100—105 



XXXn. On ,, Ai'gus and Nebula, by F. Macgeorge, Esq. 106—113 



XXXin. Areometer, by George Fooed, Esq. . . . . 113 



XXXIV. On a Method of Combining Marsh's Test for 



Arsenic with Eeinsch's, by Eev. W. Kelly . . 116 



XXXV. On the Cultivation of Mentha Piperita, or True 

 Peppermint, in Victoria, based on a Eeport 

 received from England relating to its Oil 

 value, by J. BosiSTo, Esq. .. .. .. 116 — 120 



XXXVI. Patents and their Utihsation, by Thomas Harri- 

 son, Esq 121—125 



XXXVn. On Meat Preserving, by E. Caldwell, Esq. . . 125 



XXXVni. On Biangular Co-ordinates, contributed by 



Patrick Ford, Esq., M.A. . . . . . . 125 



XXXIX. Self-acting Safety Eegulator and Coal Economiser 



for Steam Engines, by F. Poolman, Esq. . . 125 — 127 



XL. Improved Fiie-Plug, by A. K. Smith, Esq., C.E. 127—128 



