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Light and Shade.

One of fche most wonderful discoveries in science that have been made within the last year or two is the fact that a beam of iight produces pound (says the " American Art Journal"). A beam of sunlight is thrown through a lens on a glass vessel that contains lamp black, coloured silk, or worsted or other substances. A-dish, having slips or openings cut in it, is made to revolve swiftly in this beam of light, so as to cut it up, thus making it alternate flashes of light and shadow. On putting the ear to the glass vessel, strang© souncls are heard so long as the flashing beam ia falling on the vessel. Becently a f^nore wonderful discovery has baen made A beam of sunlight is made to pass through a prism, so as to produce what is called the solar spectrum or rainbow. The disc is turned, and the colored light of the rainbow is made to break through it. Now place the ear to the vessel containing the silk, wool, or other material. Aa the colored lights of the spectrum fall upon it, sounds will be given by different' parts of the spectrum, and there will be silence in other parts^ For instance, if the vessel contains red worsted, and tho green light flashes upon it, loud sounds | will be given. Only feeble sounds will be heard when the red, and blue parts of the rainbow fall upon the vessel, and other colors make no sound at all. Green silk gives' sound best in red lisjht. Every kind of material gives more or less sound indifferent colors, and utters no sound in'otWs. The discovery is a strange one, and it is thought more wonderful things will come from it.

The Early Closing Association of Christchurch have decided to alter their name to the Shop Assistants' Union.

Instances having occured of Lake Wakatipu trout, frozen, being Bold out of season in Christchurch. Tho Acclimatisation Society have decided to prosecute parsons doing so in future.

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Bibliographic details

Light and Shade., Ashburton Guardian, Volume VII, Issue 2452, 27 June 1890

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Light and Shade. Ashburton Guardian, Volume VII, Issue 2452, 27 June 1890

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