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Updated: May 10, 2025
Generally, water so secured will have to be raised to an elevated reservoir by some mechanical force. If the demand is to be a large one, and if the community can afford the cost, the most reliable plan will be to use steam-power for pumping; but in smaller places, and where economy is a great object, wind-power may serve an excellent purpose.
Yet no law restrains him. I observed that the male frigate has a red pouch under the throat which he puffs up with air when he flies far. It must have some other purpose, for the female lacks it, and she needs wind-power more than the male. It is she who seeks the food when, having laid her one egg on the sand, she goes abroad, leaving her husband to keep the egg warm.
One interesting fact, which gives to wave-power a peculiarly enhanced value as a source of stored wind-power, is that the surface of the ocean wild as it may at times appear is not moved by such extremes of agitation as the atmosphere. In a calm it is never so inertly still, and in a storm it is never so far beyond the normal condition in its agitation as is the wind.
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