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  2. Beehive shelf - Wikipedia

    en.wikipedia.org/wiki/Beehive_shelf

    The right-hand drawing is about half the scale of the others and shows the shelf in use inside a pneumatic trough. A beehive shelf is a piece of laboratory equipment, usually of pottery, used to support a receiving jar or tube while a gas is being collected over water with a pneumatic trough. It is used so that when the gas emerges from the ...

  3. Parabolic trough - Wikipedia

    en.wikipedia.org/wiki/Parabolic_trough

    A parabolic trough is made of a number of solar collector modules (SCM) fixed together to move as one solar collector assembly (SCA). A SCM could have a length up to 15 metres (49 ft 3 in) or more. About a dozen or more of SCM make each SCA up to 200 metres (656 ft 2 in) length. Each SCA is an independently-tracking parabolic trough. [9]

  4. Watering trough - Wikipedia

    en.wikipedia.org/wiki/Watering_trough

    A watering trough on a stock route, Australia A Bills horse trough in Sebastian, Victoria, Australia Sheep watering trough, Idaho, 1930s. A watering trough (or artificial watering point) is a man-made or natural receptacle intended to provide drinking water to animals, livestock on farms or ranches or wild animals.

  5. Seed drill - Wikipedia

    en.wikipedia.org/wiki/Seed_drill

    The concepts evolved from ancient Chinese practice and later evolved into mechanisms that pick up seeds from a bin and deposit them down a tube. Seed drills of earlier centuries included single-tube seed drills in Sumer and multi-tube seed drills in China , [ 1 ] and later a seed drill in 1701 by Jethro Tull that was influential in the growth ...

  6. Pneumatic trough - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_trough

    Four items are required for gas collection with a pneumatic trough: [2] The trough itself, which is a large glass dish or a similar container. A gas bottle (or bulb), to hold the gas collected. A way to support the gas bottle or bulb, such as a beehive shelf or a hanger (as with Stephen Hales' design). A liquid in the trough.

  7. Screw conveyor - Wikipedia

    en.wikipedia.org/wiki/Screw_conveyor

    [2] Screw conveyors can be operated with the flow of material inclined upward. When space allows, this is a very economical method of elevating and conveying. As the angle of inclination increases, the capacity of a given unit rapidly decreases. The rotating part of the conveyor is sometimes called simply an auger.

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