[Frost and fire : natural engines, tool-marks and chips : with sketches taken at home and abroad by a traveller] . under him, as an aeronaut does of landand clouds beneath his car. So far as this contrivance enables men to see the landunder the waves, movements under water closely resemblemovements under air. Sea-weeds, like land plants, bend be-fore the gale ; fish, like birds, keep their heads to the stream,and hang poised on their fins ; mud-clouds take the shape ofwater-clouds in air; impede light, cast shadows, and takeshapes which point out the directions in which currents is str
[Frost and fire : natural engines, tool-marks and chips : with sketches taken at home and abroad by a traveller] . under him, as an aeronaut does of landand clouds beneath his car. So far as this contrivance enables men to see the landunder the waves, movements under water closely resemblemovements under air. Sea-weeds, like land plants, bend be-fore the gale ; fish, like birds, keep their heads to the stream,and hang poised on their fins ; mud-clouds take the shape ofwater-clouds in air; impede light, cast shadows, and takeshapes which point out the directions in which currents is strange, at first, to hang over a boats side, peering intoa new world, and the interest grows. There is excitement inwatching big fish swoop, like hawks, out of their sea-weed 68 WATER. forests, after a white fly sunk to the tree tops to temptthem, and the fight which follows is better fun when plainlyseen. Of late years glass tanks have been used as fish cages,and the ways of fish are better known, because they are nowplainly seen in their own element. The ways of water may be studied in the same The principle might be extended. A boat with plate glasswindows beneath the water line would make men and fishstill better acquainted, by bringing them face to face. Theman would be in the cage, and the cage might be in a salmonpool where fish are free. If air in a hothouse be a miniature atmosphere, water in aglass tank is a working model of a sea, and heat and cold maybe set to work the model engine at home. Let one of the common fish-tanks be half filled withclear water, and placed where the sun may shine upon it. Float a few lumps of rough ice at one end, and sink ablack stone at the other; and, when the M^ater has settled, ^VATER. 69 pour milk gently on the ice. An ounce to a gallon serves thepurpose. MUk consists of small white vesicles and a fluid, and,bulk for bulk, milk is heavier than water. So at first thewhite milk sinks in the clear water, and spreads upon the
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Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookpublisheredinburghsn, booksubjectgeo, booksubjectmeteorology
