EXPANSIBILITY. 267 



If we reflect for a moment on the energy 

 which a power such as this must exert, we 

 shall be at no loss to conceive the resistance 

 which it is capable to overcome, and the rapid- 

 ity with which bodies exposed to its force are 

 carried along. GARNERIN, the aeronaut, on 

 the 31st of June, 1802, ascended with another 

 gentleman from Ranelagh in a car, suspended 

 from an inflammable air balloon, and in forty- 

 five minutes descended near the sea, four miles 

 frpm Colchester, a distance of sixty miles. 

 Allowing no time for the elevation and depres- 

 sipn of the balloon, but supposing the whole 



medium of the atmosphere, and in which no wind consequently 

 exist. 2. Winds may be divided according to the periods or 

 times which they blow, and the direction in which they more. 

 1. Monsoons, or periodical winds, are those which blow half 

 of the year from one direction, and the other half year from 

 the opposite one, and are generally found in the China and 

 Indian seas. 2. Trade winds, which resemble the monsoons, 

 and may be considered a species belonging to the same genus. 

 They are confined to the wide ocean only, at a considerable 

 distance from the shore, at about 28 on each side of the 

 equator, and are often interrupted by variations in the inten- 

 sity and direction of them, the equilibrium of the air being 

 often restored, and a cairn produced. At other times, light airs 

 taking place in different directions. 3. Variable winds > or 

 such as obey no regular rule, but which change in their direc- 

 tions at different times, without any known or assignable 

 *:attse, as we behold in these latitudes." 



