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Optical Toy
We believe these rectangular plastic lenses were intended for the view finders in inexpensive cameras. at 15mm x 21.5mm, with a short (-80mm) focal length, and a half aluminized side, they produce a reduced scale image projected onto another image. For instance, hold the half aluminized side toward you about 4" from your eye, and look at a wall. You will see a magnified image of your eye "projected" on a slightly out of focus and reduced image of the wall!! Now move the lens about 10" from your eye, put the tip of a pen about 2" from the lens and you get a big image of the pen superimposed on a reduced image of the rest of the world. Your get the idea!! Good to muse about, explain the optics for a science project, or just use to show your friends how weird the people at American Science are. We'll send you two so your friends can show their friends!!
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2130 OPTICAL TOY |
Placebo Lens
Please don't pop these little glass DCX beauties in your mouth. Sure, they're shaped like zinc tablets or miniature communion wafers - thin, 14mm dia - but they'll do you no good inside; probably even cause you harm. Instead, utilize their 48.3mm focal lengths for all classroom projects, or combine these with other lenses to build binoculars, magnifiers, microscopes and telescopes.
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27756 DCX LENS, 14MM |
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Ground Glass
One wiseacre assumed we meant any package leaving our shipping room that once had a glass object in it. That is a malicious rumor. . . Ground glass is thin plate glass, the surface of which has been physically ground or acid-etched to create a grainy, grayish, opaque surface. Use it to produce an image from a lens or lens system. Even a simple magnifier, held between the ground glass and, say, a window, will produce an image of the window scene on the ground glass. Ground glass has another magical property: it is opaque to any object viewed at a distance, but not if that object is in direct contact with the glass surface. A necessary element of your optical education. #2728 (square) is 2"sq x 1/32" thick. #2610 (rectangular) is 3-1/2" x 4-3/8" x 1/16" thick.
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2610 RECT. GND. GLASS | |
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2728 SQUARE GND. GLASS |
SURPRISE!!
Mystery Boxes of stuff like what you see in the catalog. Maybe we had a little left but not enough to continue the listing. Maybe we only got a few as part of an odd lot. Maybe we just lost some, and just found them in our warehouse. You will get items which originally listed for at least $25.00 total in our catalog (or would have, if we had enough). You pick. The "electro-mechanical" box has things like motors, switches and components that are useful parts but want to be worked into something bigger. The "consumer" box has more ready-to-go type items, and things that don't have as technical a flavor, like bottles, toys, books and giant rubber bands. The fun is in the mystery and surprise. Perfect if you don't know what to give Aunt Maude and Uncle Ned, or if you can't decide how to bring your order up to the minimum. Every couple of months the contents will keep changing, so even if you have gotten a box before, feel free to order again! (Please note: Ordering multiple boxes at the same time will result in duplicate items.)
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23610 CONSUMER SURPRISE BOX | |
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23607 ELECT-MECH SURPRISE BOX |
Diffraction Foil
Silver reflective diffraction grating foil with peel-off self-adhesive backing. 6” x 6” Pieces. Cut ‘em into shapes or stick ‘em up as is. Neat for the kids, and for eye grabbing ornamentation of teenware. Like heavy metal stuff, ya’ know!!
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6741 SILVER GRATING SHEET |
A Working Wonder
If we had a category just for customers who lust after Jules Verne inventions and elegant gadgetry, this would be in it. The wonderful brass sundial, a reproduction of an antique, is approx 3" dia x 11/16" thick overall, and actually works! A latitudinal gauge lets you tilt the engraved dial to the correct angle for your location, and a bubble and three leveling feet allow the 1-1/2" dia lock-down compass to point in the precise direction. And if you never took it out into the sunshine, you'd still love it for the look and logic of it.
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92848 BRASS SUNDIAL |
Boogie Bot
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
Makes us want to dance every time we wind up one of these clever/goofy fools. The little 3-1/2" tall squarehead with the smiley face does what some of us (of a certain age) believe is a modified bugaloo. Very nice hip action, a rotating tummy, and watch out for those swinging arms. If you've ever said "to live is to dance, to dance is to live," you need this guy. We'll send you a red, grey or blue version, but frankly, you ought to have to a pair, because nobody likes to boogie alone.
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92932 DANCING ROBOT |
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Take-Apart Tripod
Handy for light-duty applications, say 5 lbs or less, this black steel tripod has a span of 22" between the low legs and stands 54" tall at the top of the 5/8" dia mast. Great for hanging holiday decorations (it was originally intended to support a plastic skeleton) it can also support signs, notices, etc. Comes apart into 2 plastic bushings and (6) pieces, each less than 18" long, for storage.
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37414 TRIPOD STAND |
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