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Plastic Graduates
The Graduate devotee knows the importance of plastic. To fill the need we offer these fine cylinders of the hard milky white polypropylene persuasion, to help you measure out your chemicals. With a large bases for stability and spouts for pouring, they are just like their glass cousins, except these are cheaper and not heat-resistant (each is marked 20° C ?!). The graduation increments and total volume are shown as increment/total in milliliters.
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91175 PLAS. GRAD., 0.2/10ML | |
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91176 PLAS. GRAD., 1/50ML | |
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91177 PLAS. GRAD., 2/250ML | |
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91178 PLAS.GRAD., 10/1000ML |
Screaming Yellow Banners
Each has black lettering stenciled on bright yellow plastic tape, with the message repeated over and over. They are 3" wide by 200 ft or 1000 ft long. All are the real thing, made for sale to police and other serious users. Some have an obvious industrial application, some will work in the school playground, some seem appropriate to cordon off the kids’ rooms.
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22973 CRIME SCENE TAPE (200 FT) | |
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37648 FIRE LINE TAPE (1000 FT) | |
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22970 POLICE LINE TAPE (200 FT) | |
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12436 SHERIFF LINE TAPE (1000 FT) |
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Love Meter
AKA hand boiler. An exotic bit of hand blown glass with a bulb at top and bottom connected by some zippy tubing that spirals, loops, and/or jogs. In the closed system is some colored liquid (methyl chloride) that is very light. Hold the lower bulb in you hand and as the air in the system is warmed it pushes the fluid through the loops to the upper chamber. When all the liquid is pushed out of the lower bulb, expanding air will bubble through the tubing making it appear that the liquid is boiling. WARNING! The glass is fragile and the liquid is nasty. If you drop the thing on e.g. the kitchen tile, it will eat the finish off the tile and the stain in the liquid will permanently stain the floor. So don't let kids handle this item unsupervised. About 7" tall, it is a favorite in our stores.
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6199 LOVE METER |
Simple Circuit
An easy way to light up the kids' eyes! Teach them to wire a simple circuit with our basic components. The knife switch is mounted on a plastic base. The miniature plastic socket holds a standard flashlight bulb with a 14 mm dia screw base. We pack 6 volt and 3 volt round bulbs, or 1.5 volt bell-shaped bulbs, (5) to a package.(Bulbs are rated slightly higher to prevent them from burning out.) Or hook up the black plastic and metal 2" x 4-1/4" telegraph key with brass contacts and (2) terminal posts with nuts. Our blue-plastic holder for (1) "D" battery has a small tab at each end to hook a lead to, and a 1/8" square mounting hole at each corner. You add the mounting surface and the know-how. Actual bulb voltage listed in parenthesis.
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91160 1.5 VOLT BULBS (2.5 V) | |
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91159 3 VOLT BULBS (3.8V) | |
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91158 6 VOLT BULBS (6.3V) | |
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38806 KNIFE SWITCH, DOUBLE POLE DOUBLE THROW | |
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38808 KNIFE SWITCH, DOUBLE POLE SINGLE THROW | |
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38805 KNIFE SWITCH, SINGLE POLE SINGLE THROW | |
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91769P1 SINGLE "D" BATTERY HOLDER | |
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38811P1 SOCKET | |
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91813 TELEGRAPH KEY |
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Lab Stand
Affordable, adaptable lab equipment for serious scientists with laughable budgets. The basic stand is heavy black metal 8" long x 5" wide x 1" high with a 19-1/2" x 3/8" dia support rod screwed into it. Position a beaker or bunsen burner on the stand and build the configuration you need above it. Both of the Burette clamps and the ring attach to the rod with thumbscrew clamps. The Burette clamps have wing nuts so they can be adjusted to any angle. The single clamp extends 4" from the rod, with rounded, uncoated, adjustable metal jaws with spring tension and a wing nut. The double clamp like it has rubber-coated jaws. The 3" metal support ring holds the 6" x 6" heavy-gauge steel-mesh burner screen with crimped edges. Nice, solid equipment at a rare price.
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88192 3" SUPPORT RING | |
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91831 6" X 6" SCREEN | |
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88597 DOUBLE CLAMP | |
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88195 LAB STAND | |
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88186 SINGLE CLAMP |
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Funnel? Piece of Cake
Two sizes of Bomex separatory funnels with ground glass stoppers and petcocks. The 100ml funnel is 9-1/2" long overall. The 500ml is 14-1/2" overall. An excellent price for basic lab glassware.
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91702 SEP. FUNNEL, 100ML | |
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91703 SEP. FUNNEL, 500ML |
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Thump Swish
Find out if you are alive, and if so, whether your blood pressure is so low you will tip over when you stand up. This home blood pressure kit includes the usual D-ring cuff, a nurses' stethoscope and full instructions on their use. Not a toy, it is the real thing. Great for monitoring your health and for educational purposes. It is a two-party set, meaning it is most easily used by two people. Anyone want to play doctor?
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91502 BLOOD PRESSURE KIT |
Me, Me, Me, Me, Mee
You can start with our single aluminum tuning fork, 2-tined and 7-1/2" long. It vibrates at 256 hz, and is labeled "C". Or you can order the set that has (8) forks and a mallet with a rubber-tipped plastic head. The forks are labeled low-C to high-C and come in a fitted, latched wooden box. Unfortunately, C.J., who has perfect pitch, tells us that his pitch is more perfect than most of the tuning forks. He also says you can file the tips, tuning them to an electronic keyboard until they're perfect - and we think there's a certain cachet to telling people you tuned the forks yourself. But they are perfect, if you're using them for things like teaching principles of sound or driving the chihuahua crazy.
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91185 TUNING FORK | |
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91772 TUNING FORKS, SET |
Scope Your Stethos!!
Stethos is Greek for chest. Indeed you can scope your stethos with this stethoscope, or your friend's or your dog's. But it works equally well for picking up any sound being transmitted through a solid medium. Listen to the air flowing through the heating ducts, the water in the pipes, the sounds of machinery, the termites munching on the floor joists!! The color does vary so we will select from what's currently available. We've had blue, teal, red, black, burgundy, green and purple, but there may be other colors yet to be seen! A great discovery device whether for biology or other pursuits. Not of professional quality, but not just a toy.
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11077 STETHOSCOPE |
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Sheets Of Pseudo Silver
Surplus - with a silver lining! We have almost half a hundred rolls of 18-1/2" wide mylar film, the shiny side printed with a variety of balloon designs - happy birthday, happy retirement, happy other things - and a matte silver finish on the other (picture the two sides of aluminum foil). We'll send you a roll of 20 ft. Lots of craft-project potential. Start with a shiny birthday kite. Move onto hand-made hair scrunchies. Jim suggests wrapping yourself in it if your car stalls in the Arctic. Philip, always the adventurer, is considering a do-it-yourself dirigible.
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33277 MYLAR MATERIAL |
Mirage Maker
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
Absolutely incredible device! The Mirage®, a precision optical instrument, creates three-dimensional images of objects of your choice where there is nothing. Drop pennies, keys or similar small objects (your sister won't fit) into the 2-3/8" dia opening of this 9" dia x 3" high flying-saucer-shaped disc, and a perfect image of the object will appear floating above it. The image is so real friends will try to grasp it, but their fingers will close on thin air! Use it as a high-tech centerpiece with a flower as the object! A booklet (included) explains the magic. New coating provides protection for the mirror surfaces. Highly recommended. Made in the USA.
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88375 MIRAGE |
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