Sessional papers of the Dominion of Canada 1911 . , it finally reachesa creek, a swamp or a lake, and collects to form and maintain a river. According tothe square miles of surface, the rainfall reaching the river will be larger or smaller, andatmospheric conditions fijc the amount of rain over a given area. The atmosphere does not extend to other spheres, but closely envelops the eartli ina layer 100 miles thick. The gas mixture, constituting the air, holds in solution water vapoiu, which islighter than dry air, consequently the colourless mixture ascends. Water vapour is1 per cent by weight
Sessional papers of the Dominion of Canada 1911 . , it finally reachesa creek, a swamp or a lake, and collects to form and maintain a river. According tothe square miles of surface, the rainfall reaching the river will be larger or smaller, andatmospheric conditions fijc the amount of rain over a given area. The atmosphere does not extend to other spheres, but closely envelops the eartli ina layer 100 miles thick. The gas mixture, constituting the air, holds in solution water vapoiu, which islighter than dry air, consequently the colourless mixture ascends. Water vapour is1 per cent by weight of the atmosphere and, as the air containing it rises and cools, thevapour condenses into clouds and finally falls as rain. Diffusion of the atmosphericgases constantly takes place. Otherwise the heavy carbonic gas would settle into alayer over the earths surface with poisonous effects. Dust particles are also contained in the air both over land and water, varyingfrom 10,000 particles per cubic inch over the oceans to six times as many over land. No. 22. -Rating current meter in winter. The ice covering increases the friction andretards the rate of flow. 1 «*, ?jkk ^^^?iV^^^ 9 -^.i HP^^9 p. B|^^^35 ^^^^B mK^ ^1^ ik\. l\^ ^M Nil. 2X —Rating cunent iiietrr in siiiiiiiier at tlie inifinislied powei canal at Deschesne Rapids, thewatt-r hire was quiet and averaged about five feet in depth. The car was pushed by two menat sjieed ranging l>etween one-half foot and twelve feet per second, over a course of one hundredfeet. 40 DEPART ML\r OF IlBLlC WORKti 1 GEORGE v., A. 1911 areas, and forty times as many over cities. At about three miles liigh, the air is onlyhalf as dense as at sea level; the clouds cease, that is, the air is not dense enough tofloat water vapour, and the temperature is reduced to freezing point. The earths surface is the bottom of an ocean of air which flows and swirls, and currents like the oceans of water. These currents are the results of the he
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Keywords: ., bookauthorcanadapa, bookcentury1800, bookdecade1860, bookyear1868
