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  • Description

    "Walking on the Water - How it's done without getting wet feet."

    We are shown a shady brook which is "the skating rink of the water striders." C/U of insects with long legs perched on the surface of some water - water boatmen? "How do they do it? The principle can be shown by stretching a rubber sheet over a frame - " C/U of a man stretching a piece of rubber. He then presents to the camera a small frame which has a piece of rubber stretched across it and secured by nails." "Six pegs in a wooden block will serve as the feet of the water-striders." A little wooden block is moved around on top of the rubber. "From the under side - the feet of the water strider are exactly similar to the impress of the pegs - they dent the surface but do not penetrate - " Shot from underneath the rubber with the pegs making an impression in the rubber.

    "The pegs don't pierce the sheet because they are supported by "surface tension". So long as a drop of water is not pierced, it will support its own weight and an added load in defiance of gravity." Extreme C/U of man putting a drop of water inside the eye of a piece of metal. Extreme C/U of the water as it falls through the eye and hangs suspended. "The strider is designed to take the greatest advantage of the tensile property of water. Extreme C/U of the strider. C/U of a special tank which shows the insects skimming the top of the water. "The microscope shows how the strider makes a dent without piercing the surface, as if the water were a rubber sheet!" C/U of one of the legs of the insect pressing down on the rubber. "An underwater view shows that he makes a hole but leaves no footprint!" View from under the surface of the water.

    Was an item in Pathe Pictorial issue number 657.

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  • Data

    British Pathé
    Issue Date:
    Media URN:
    HD Format:
    Available on request
    Film ID:
    Black & White
    Time in/Out:
    01:34:21:00 / 01:37:29:00
    EP 160
    Sort Number:
    EP 160
  • Appears in...

    Biology Physics Water Droplets Scientific Disciplines
  • Stills

    0:01 0:02 0:03 0:04

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