
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 |
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 |
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, hardware 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 |
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 |
And close enough, because sometimes the threat of security will do. Our simulacamera looks like the real thing, even though it isn't, with an activation light and a quite real motion detector that causes the "camera" to pan from side to side. The unit measures 3-3/4" x 2" x 2" with a 1-1/4" dia lens. It's mounted on an adjustable 4" x 1-1/8" x 3/4" arm attached to 3-1/8" dia baseplate with (2) 3/16" mounting holes. The angle adjusts from 45 to 180 degrees, and the motion detector starts the head swinging 20 degrees in either direction for approx (15) seconds. Takes (2) "AA" batteries, not included, but does include mounting screws and mollies-and a tiny, tiny price.
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92835 DETECTOR CAMERA |
Works on all of them except the ones stuck to your eyeballs. Corrosion-Be-Gone is a gel made to remove the schmutz from all types of battery terminals, circuit boards and contacts, on everything from cars to computer boards. Our each is a 0.3 oz jar.
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93684 BATTERY GOOP |
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