TRANSACTIONS OP THE SECTIONS. 269 



same latitude north, aided, no doubt, by the continent of North Amarica, which, 

 extending for thousands of miles, is verj^ different from the small island of Mauri- 

 tius, only 30 miles across, and along the coast-edge of which the cyclone rolls like 

 a wheel along a plane surface. The slight westward trending of the direction of 

 the trade-wind, as we go further from the equator, would undoubtedly tend to pro- 

 duce a slight southerly deflection of the cyclone from an early part of its course, 

 which deflection would be aided by the increase of speed in the proper motion of 

 the cyclone due to the causes above mentioned ; and such deflection is exhibited 

 in the charts produced by the author. 



In accordance with this theorj' also we would expect that, as the force of the 

 trade-wind must increase from the summer to the winter solstice, we should have 

 a northerly trending of the track of cyclones during that period, due to this increase 

 of force in this component of their motion ; and, to show that facts were in accord- 

 ance with this theory, Mr. Ashe quoted the following passage from a paper read by 

 Lieut. Fyers, R.E., reported in the ' Transactions of the Meteorological Society of 

 Mauritius,' 1855, p. 58, viz. : — "As far as my experience goes, the November and De- 

 cember storms invariably take a southern course to the eastward of Rodriguez, and, 

 as the season advances, in January, February, and March, they take a more west- 

 erly direction, sometimes passing north of Mauritius and continuing to the coast 

 of Madagascar, at others passing between Rodiiguez and Mamitius," — a statement 

 which, on referring to the map, and recollecting that the writer took his point of 

 view from Mam-itius, we find exactly to correspond with a northerly trending of the 

 track of cyclones during those months. 



The increase in diameter, and decrease in violence of a cyclone, as it progresses, 

 Mr. Ashe attributed to the engagement of more air in the rotatory motion, owing to 

 the friction exercised by the walls, as it were, of the cyclone against the smTOund- 

 ing atmosphere, while, as the force did not increase in consequence, the velocity of 

 the mass moved would necessarily diminish. 



Prices in England 1582-1620, and the effect of the American discoveries ujoon 

 them during that period. By Professor J. E. T. Kogees, M.A. 



On the RoclidaU Cooperative Societies. By Danlel Stone, F, C,S. 



The Commerce and Manufactures of the Colony of Victoria. 

 By WiiLiAit Westgarth. 



The Commercial JRelations betiveen England and France. By Richard Valpy. 



An Examination of the increase of densiti/ of Population in England and 

 Wales, 1851-61. By T. A. Weitok. 



On the Economical Effects of the recent Gold Biscoviries. 

 By Henry Fawcett, M.A, 



On some Woods employed in the Navy. By Professor F. Grace Caltert. 



On Telegraphic Wires. By Messrs. Silver. 



On a Locomotive for Common Roads. By Septimus Mason. 



On Economy in Fuel. By T. S. Pribeaux. 



On an improved Feed Wafer Heater for Locomotive and other Boiler's, 



By S. Bateson. 



