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In Great Britain and many European countries rain gauges have been established at a greater or less number of stations for many years past, and data thereby afforded for estimating approximately the rainfall of any given district or catchment basin.
The whole country was a catchment of patriotism a huge river-basin and these marching bands from the far-out country were the tributaries which fed the huge river of men which flowed from the State capitals to the concentration camps in Sydney and Melbourne.
A hundred or more Arabs were engaged, under the supervision of a keen-eyed young Frenchman, in digging a multitude of curved concentric ditches across the hollow of the catchment area, intersected by diagonal ones here and there; the general appearance of the work the bright yellow of the newly excavated part set against the dark ground of the old was as if some gigantic fishing-net had been carelessly thrown across the country.
But now, with these little ditches, we hope to catch and tame the showers, and force them to wander about in these channels till they either sink into the earth or evaporate. Not a drop of liquid is to leave the catchment basin; it is exactly the reverse of what we desire in Europe." It struck me as a simple and efficient device.
Concerning farming, it is an unknown quantity here, as we in Australia understand it. These people simply squat down wherever they can find a natural catchment for water. There is no clearing to be done, as the land is quite devoid of timber. They put nigger labour on, and build a farmhouse. These farmhouses are much better built than those which the average pioneer farmer in Australia owns.
The electricians had contrived a catchment pool and a wheel in the torrent close at hand for the little Mulhausen dynamo with its turbinal volute used by the telegraphists was quite adaptable to water driving, and on the sixth day in the evening the apparatus was in working order and the Prince was calling weakly, indeed, but calling to his air-fleet across the empty spaces of the world.
The advantages of having ample water for battery purposes, or of using water as a motive power, are so great that it is very often desirable to construct a tramway of considerable length, when, by so doing, that power can be utilised; hence most quartz mills are placed near streams, or in valleys where catchment dams can be effectively constructed, except, of course, in districts where much water has to be pumped from the mine.
The description of the Earth is not full and complete, and is lacking in its most important particular, when it excludes a description of Natural Beauty, and only includes scientific details about the size and shape of the earth; its configuration; the composition of the crust; the depth, area, and volume of the ocean; the temperature, degree of moisture and pressure of the atmosphere; the height of the mountains; the length, breadth, volume, course, and catchment area of its rivers; the mineral and vegetable products of various regions; the political areas into which it is divided; the relation of the political and commercial activities of the population to the physical character of the features and to the climate.
Bartimaeus in Unreality grows quite enthusiastic over these gardens, though he does not mention their three peculiarities. One is a fountain, the only one in the islands. As there is not one drop of fresh water, this fountain has its own catchment area, and its own special rain-water tank.
"My new suit!" cried some one. "Perrrrrr-up pe-rr" a new vertical line of blackened water would establish itself and form a spreading pool upon the gleaming cloth. The men nearest would arrange catchment areas of plates and flower bowls. "Draw up!" said Tarvrille, "draw up. That's the bad end of the table!" He turned to the imperturbable butler.
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