11 CONTENTS. 



Page 

 X. Facts relating to the Formation of Dew. By George Hakvey, Esq. 

 F. R. S. Lond. & Edin. Communicated by the Author, - 69 



XI. Astronomical Observations made at the Observatory of Paramatta in 1824. 

 Communicated by his Excellency Sir Thomas Brisbane, K. C. B. 



F. R. S. Lond. & Edin. ..... 72 



XII. Account of a Stickleback that was found with a Leech alive in its Intes- 

 tines, July 1818. By Mr John Ramage, Aberdeen. Communicated 



by the Author, ...... 74 



XIII. Observations on the Temperature of Springs, Wells, and Mines in Corn- 

 wall. By John Davy, M. D. F. R. S. Communicated by the Author, 7a 



XIV. Observations on the Flints of Warwickshire. By Edward Grimes, 

 Esq. R. N. Communicated by Thomas Allan, Esq. - 77 



XV. Observations on the Habits of the Hyaena. By Robert Knox, M. D. 

 F. R. S. E. Lecturer on Anatomy and Physiology, and Conservator of the 

 Museum of the Royal College of Surgeons. Communicated by the Au- 

 thor, -...-- 80 



XVI. Account of the Explosion of Oil Gas which took place at Edinburgh, on 



the 23d March 1825, with Observations on the Safety of Gas, - 83 



XVII. Description of a Machine applied to a Gig, for Measuring Distances. 

 By William Edgeworth, Esq. C. E. and M. R. I. A. Communicat- 

 ed by the Author, .... - - 93 



XVIII. A Description of Fan-Gate Sluices, Invented and Constructed by Mr 

 J. Blanken, Jun. Counsellor of State, Inspector-General of Public 

 Works in the Kingdom of the Netherlands. By Dr G. Moll, Professor 

 of Natural Philosophy in the University of Utrecht. Communicated by 



the Author, ....,-- 95 



XIX. Table of the Rise of the Tide at Hobart Town, Van Diemen's Land, 

 in April and May 1822, and January 1823. Communicated by his Ex- 

 cellency Sir Thomas Brisbane, K. C. B. F. R. S. L. & E. &c 100 



XX. On the Application of the Expansive Power of Liquids to produce a Reci- 

 procating Rectilinear Motion. In a Letter to the Editor, - 101 



XXI. Additional Observations on Leslie's Photometer, &c. By William 

 Ritchie, A. M. Rector of the Academy at Tain. In a Letter to Dr 

 Brewster, .....-- 104 



XXII. Account of a Remarkable Explosion of Gas in a Well near Leith Fort 



By Mr John Coldstream. In a Letter to Dr Brewster, - 108 



XXIII. Notice of a Remarkable Variety of Boracite. By William Hai- 

 dinger, Esq. F. R. S. E. Communicated by the Author, - 110 



XXIV. On a Dike of Serpentine cutting through Sandstone in the County of 

 Forfar. By Charles Lyell, Esq. Secretary to the Geological Society 



of London, F. L. S. Communicated by the Author. With a Plate, 112 



XXV. Notice of a Remarkable Occurrence of Serpentine at the Junction of 

 Sienite with the Dolomite of the Tyrol. By J. F. W. Herschel, Sec. 



R. S. Lond. and F. R. S. Edin. Communicated by the Author, 126 



XXVI. Notice of the remains of an Animal resembling the Scandinavian Elk, re- 

 cently discovered in the Isle of Man ; with Suggestions on the Importance 

 of distinguishing this Animal fiom the Fossil Irish Elk. In a Letter to 

 Dr Brewster, from Samuel Hibbert, M. D. F. R. S. E. and M. G. S. 

 Secretary to the Society of Scottish Antiquaries, - - 129 



