Page:The Life of the Fields, Jefferies, 1884.djvu/202

188 to get up at five will find them ravenous. We often visited the place a little after that hour. A swim was generally the first thing, and I mention a swim because it brings me to the way in which this mere pond illustrated the great ocean which encircles the world. For it is well known that the mighty ocean is belted with currents, the cold water of the Polar seas seeking the warmth of the Equator, and the warm water of the Equator floating—like the Gulf Stream—towards the Pole, floating because (I think I am right) the warm water runs on the surface. The favourite spot for swimming in our pond was in such a position that a copse cast a wide piece of water there into deep shadow all the morning up till ten o'clock at least. At six in the morning this did not matter, all the water was of much the same temperature; having been exposed to the night everywhere, it was cold of course.

But after ten the thing was different; by that time the hot reaper's sun had warmed the surface of the open water on which the rays fell almost from the moment the sun rose. Towards eleven o'clock the difference in temperature was marked; but those who then came to bathe, walking along the shore or rowing, dipped their hands in and found the water warm, and anticipated that it would be equally so at the bathing-place. So it was at the surface, for the warm water had begun to flow in, and the cold water out, rather deeper, setting up, in fact, an exact copy of the current of the ocean, the shadowed part by the copse representing the Polar area. Directly any one began to swim he found the difference, the legs went down into cold water, and in many cases cramp ensued with alarming results and