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How Does It Work?
Why does it do that? Develop an elemental understanding of magnetism, electromagnetism, electrochemistry, radio, thermodynamics, light and optics. Simon Quellen Field's 228-page paperback, Gonzo Gizmos, Projects & Devices to Channel your Inner Geek explains processes, equipment and scientific terms -- and then, for starters, tells you things like how to make a rotary steam engine in 15 minutes from a soda can, a candle and a few scraps of rubber tubing. It's the favorite of our resident geeks -- but not for kids unless they're working with an adult. That would be a mature adult. An insured, mature adult.
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92339 GONZO GIZMOS |
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Gear Up
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
Or gear down-for the science fair or for any number of hobby projects. This hard-to-find set of (3) combination spur/beveled gears-for when you want gears set either straight or at 90° to one another-also has one small spur gear, plus three bushings. All in red, green, or blue plastic (we'll pick). The combo-beveled gears are 1-5/8", 1-1/4" and 27/32" dia with 3/16" bores to accept the bushings, which are 3/16" OD, 3/32" ID. The straight gear is 17/32" dia with a 1/16" half-bore. All are 24 pitch.
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92657P1 GEAR SET | |
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92657P10 GEAR SET (10) PACK SAVINGS | |
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92657P30 GEAR SET CLASSROOM PACK SAVINGS |
Pocket Microscopy
Good things come in (2) different small packages. Our pocket microscopes are compact and perfect for a clear, close look at stamps, coins, flora, insects or assorted minutiae. The 30X version measures 5-3/4" x 1-5/8" x 3/4" in black plastic with a focus knob, on/off switch, small LED for illumination, and a vinyl carrying case. Requires (2) "AA"s. The 60X version is a microscopic 3-1/4" x 1-3/16" x 3/4" and has a built-in white LED illuminator powered by (3) coin-cell batteries that are included. Magnifies from 60-100X, with coarse- and fine-focus knobs, and has a vinyl carrying case.
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34407 30X HANDHELD POCKET MICROSCOPE | |
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93252 60X HANDHELD POCKET MICROSCOPE |
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Work Gloves
Gray work gloves at a very nice price. Our each is a pair, with sueded leather palms and sueded leather fingers, cotton tops, and 2-3/4" gauntlets (or gantlets, if you prefer). For big paws only: approx L/XL.
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93369 WORK GLOVES |
RARE FIND!
Rare earth magnets are usually killers for their size, and these thick nickel neodymium discs are no exception. The price, on the other hand, for (3) 7/16" dia x 1/4" 5-lb lift or (2) 9/16” dia x 3/16” 8-lb lift magnets each stored on a 2" dia steel disc, is a rare exception.
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93463 MAGNETS, SET OF 2 | |
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92042 MAGNETS, SET OF 3 |
You Say Breadboad...
And the manufacturer, Elenco Electronics, says Bredblox, but what’s in a name? These are just nice little breadboards for electronic experiments. The Elenco Model 9830 measures 6-1/2" long x 2-1/8" wide x 5/16" thick with (2) power busses up both long edges and (63) double rows of more busses. The holes for components and jumper wires are approx .050" each and multiple boards can be interlocked via tabs and ports on the long edges. Now go invent something and get rich.
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93061 9830 BREADBOARD |
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Alnico Bar Magnet
Pair of alnico bar magnets, each 7/16" x 1/4" x 3". Magnetized end to end with the North pole marked, the North end painted red and the South pole painted blue. Come with a pair of keepers and a wood separator bar.
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89326 ALNICO BAR MAGNETS |
Page-Sized Fresnel Lens
Magnify the whole page and see all that nasty fine print at one time. Our hard acrylic fresnel sheet is 8-3/8" x 11" x 1/16" thick with a focal length of approx 10". Magnifies to about 2X. Solar experiments, too!
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38939 FRESNEL SHEET |
Whet's Your Problem?
Life too dull? You need a whetstone, and this one, while it's not a stone at all, is a big improvement. It's a 4-sided diamond sharpening block, 6" long x 2-1/2" on a side, sitting snugly in a wooden holder with slip-resistant rubber feet. The sides are 200, 300, 400 and 600 grit, so you can work your way up to a razor's edge on knives, chisels, or anything that needs a little edge.
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93750 4-GRIT DIAMOND ENCRUSTED WHETSTONE |
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The $10 Chain Saw
No gas or electricity needed for this pocket-sized manual chain saw, the camper's pal. It's 30" long overall, with (82) spring-steel teeth on the 18-1/2" middle section, and canvas loop handles on each end. Imagine a cross between a sharpened bike chain and a garotte. It's easy to use (we tested it), works a whole lot faster than a hatchet, rolls up into no space at all, and stores in the heavy-duty canvas belt pouch that comes with it.
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93748 HAND CHAIN SAW |
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The Driest Rocks On Earth
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
Tektites, called glass rocks, are formed when meteorites from outer space crash into our home planet and, by Jupiter, no rock collection is complete without one! The driest of all rocks, tektites are black to olive-green, and average less than .005% water. These samples will be roughly 1/2" to 1-1/4", and you'll get (2) to (4) of them, depending upon their size.
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93975 TEKTITES |
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