Papers for the Schoolmaster, Vol. 14: 1864 (Classic Reprint)

Excerpt from Papers for the Schoolmaster, Vol. 14: 1864

Another most important function is performed by the joint machinery, by the Sea and Air, in the distribution of heat. Let us' see this also. The Sun pumping up the water in the shape of vapour, stores up heat in that vapour, which remains latent until the air-sponge is squeezed. The clouds travel with this heat until they come to Northern regions, where land preponderates, and there the cold squeezes the vapour, which, as it passes into water, gives out not only rain but heat, and so acting as heat carriers, the clouds temper our winter. [before it rains, this increase of temper ature is often felt, because then the condensing process has begun] But more than this, the clouds are the great compensate. They stand between the Sun and Earth; At nigh, they prevent the radiation of the Earth's hea't like a blanket by day, they keep ed the heat like a shield. At one time, by night, the clouds spread themselves out, and the Earth wraps herself up as with a cloak; and at another, at day time, they protect the land from drought, like a parasol, and the plants from being scorched. Nor must it be forgotten that, spread over the sea, the clouds do an important service, by preventing an undue evaporation.

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