Untitled

Cromwell Argus, Volume XLI, Issue 2211, 5 September 1910, Page 2

LIVING UNDER lOTi How does a fish contrive to live in in ice-covered pond into which no air jan enter '( Tins question has puzzled many. Says a scientist: "The matter troubles the fish but little. In Siberian or American rivers they catch fish througr three or more feet of ice, a.nd find then in capital condition, too. Yet the fish mufrt' have air. How does he get it. I is in the water at all times, plenty of it You may discover its presence by allowinj water slowly to become warm in a ve*se. of tin or iron. The air, which is held ii the water very much as water is held ir i sponge, is expanded by the heat, and may be sren gathering in small bubbles attached to the surface of the vessel. A fish needs very little air, for he has verj tittle blood, and this is sufficiently oxidised Dy coming in contact v/itlh air in the water forced through his gills. If you take a firih from his element you will ob «rve his gills to redden suddenly. This is due to the ram'd oxidation of the blood The fish is killed by excess of air." .- _■> ■■■ ' ' "%'