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Density Blocks Set
Density Blocks Set
14709

Dense wood cube 1" sides. Average weight 16 grams/cube. Wood block: 2" x 2" x 1/8" soft wood. Steel block: 2" x 2" x 1/8". Aluminum block: 2" x 2" x 1/8"
Dense wood cube 1" sides. Average weight 16 grams/cube. Wood block: 2" x 2" x 1/8" soft wood. Steel block: 2" x 2" x 1/8". Aluminum block: 2" x 2" x 1/8"

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$1.49 Each $4.95 Each
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Density Cylinders - Set of 4
Density Cylinders - Set of 4
14705

Aluminum, brass, copper, and steel. 50mm x 12.5 mm.
Aluminum, brass, copper, and steel. 50mm x 12.5 mm.

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$3.45 Set $11.50 Set
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Density Flow Model
Density Flow Model
15854

With the full-size kit, demonstrate important density concepts to an entire classroom. Challenge students to use scientific inquiry techniques to explore geology, meteorology, freshwater and saltwater systems. Using the illuminated flow of colored fluids, students can visualize abstract concepts related to plate tectonics, sea-floor spreading, air masses, fronts, air pressure, winds, ocean currents, thermoclines, haloclines, upwelling, El Nino and more. Dimensions: 44"L x 6"H x 3.75" W. 72-page manual.

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$115.50 Each $385.00 Each
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Density Identification Kit
Density Identification Kit
15860

Ask your class to identify each of 12 different samples by determining their density. Each cylinder varies in size and density since it is constructed of a different material. All are 1/2" in diameter and vary in length. This kit includes: 12 samples, an attractive wood storage rack coated in linseed oil for protection from wet specimens, and detailed instructions with theory. Samples include: aluminum, brass, copper, acrylic, pyrex, rubber, delrin (plastic), PVC, PTFE, nylon, poplar and oak.

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$16.65 Each $55.50 Each
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Density Rod
Density Rod
14313

What floats in cold water, sinks in hot? Our precisely calibrated cylinder demonstrates the differing density of a liquid at different temperatures. Fits most graduated cylinders. Illustrated instructions. Good for middle school.
What floats in cold water, sinks in hot? Our precisely calibrated cylinder demonstrates the differing density of a liquid at different temperatures. Fits most graduated cylinders. Illustrated instructions. Good for middle school.

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$6.40 Each $12.95 Each
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Dental Care Model
Dental Care Model
16921

A great economical model to teach dental hygine and demonstrate the correct way to brush teeth and gums. Large lower and upper jaws, 6" wide on the back, 5" long. The two jaws are connected by bendable spring wires for easy demonstration. The model is 17" long, when it is completely laid flat. Included a 10" long tooth brush with nylon bristles.
A great economical model to teach dental hygine and demonstrate the correct way to brush teeth and gums. Large lower and upper jaws, 6" wide on the back, 5" long. The two jaws are connected by bendable spring wires for easy demonstration. The model is 17" long, when it is completely laid flat. Included a 10" long tooth brush with nylon bristles.

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$11.55 Each $38.50 Each
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Deposition Observation Water Tank Kit
Deposition Observation Water Tank Kit
16982

Watch how solids settle in layers at the bottom of a tank. Includes: Acrylics tank, slope, open tube, plastic drain tube and sprinkler head for plastic bottle. Dimensions: Tank - 11.8" x 2.8" x 5.9", Slope - 11.2" x 2.5" x 0.79", Open tube - 13" x 2.5" x 3.1", Plastic drain tube - 3.9"

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$24.89 Each $82.95 Each
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Detective's Casebook (40 Student Kit)
Detective's Casebook (40 Student Kit)
14909

Your students will become junior detectives, honing their forensic skills by solving the mysteries surrounding a fictitious "crime scenario". They'll conduct a series of forensic analysis activities to determine if a crime has been committed. Each activity is centered around a particular analysis technique to include toxicology, chromatography, finger printing, document analysis and simulated blood typing.

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$20.99 Each $69.95 Each
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Dextrose, lab grade, anhydrous, granular - 500g
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Dial Barometer
Dial Barometer
12886

Dual Scale
Hecto Pascal (hPa)
Millimeter Mercury (mmHg)
4" Dial
5 YR Warranty


Dial Barometer for Classroom, Lab, Industrial Use. Large, clear dual-scale barometer in hPa (hecto Pascal) and mm (millimeter mercury) on a 4" dial which is easy to read from a distance. For classroom, lab, or industrial use. Accuracy of ±3 to 4 hPa. Wall mounts. Weight: 2.6 oz.

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$9.23 Each $30.75 Each
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Diffraction Grating
Diffraction Grating
15944

Glass mounted for use with Spectrometers and Spectrum Tubes. Viewing area 44 mm x 300mm. 15,000 lines per inch.
Glass mounted for use with Spectrometers and Spectrum Tubes. Viewing area 44 mm x 300mm. 15,000 lines per inch.

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$11.20 Each $22.50 Each
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Digestive Walk-Thru
Digestive Walk-Thru
16691

Get your students up out of their seats and literally walk the path of the human digestive system! Book illustrations and hand-out diagrams for the digestive system are boring. The Digestive Walk-Thru mat measures 70" x 70" and comes with a convenient storage bag. This is a perfect review and quiz product for your students. A Teacher's guide provides additional information, activities, and assessment sheets for the classroom.

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$32.90 Each $65.95 Each
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Digiscope Discovery Pack - Individual Version
Digiscope Discovery Pack - Individual Version
16750

Package includes DigiScope DS-300, Exploring with a Digital Microscope curriculum guide CD-ROM (Individual user version), quick start guide, calibration slide, stirrer-spoon, dropper, forceps, experiment manual, and soft storage case. The Digiscope DS-300 brings high resolution digital capture technology to your classroom at a very affordable price. Specially designed for young students, the easy-to-use scope allows you to capture images or video clips in field or lab, then display them on Windows or Macintosh computers or projection devices. Motic Play image capture software (included) provides tools for image measurement, labeling, and manipulation. The upper half of this two-piece system is a USB camera that can be removed so you can use the microscope separately. The camera is powered by the USB port of your computer. Built-in LED lights provide efficient upper and lower illumination - up to 50 hours on 3 "AA" batteries (not included). The DigiScope DS-300 is easy to use, precise, accurate, and durable. Plus, a free virtual lab Teacher Resource CD-ROM brings science alive for your students. Resolution: 640 x 480 pixels Magnification: 20x - 100x (70x - 350x on screen) Focus Range: 30mm Working Distance: 22mm to 42mm Size: 7"H x 5"W x 4.5"L
Package includes DigiScope DS-300, Exploring with a Digital Microscope curriculum guide CD-ROM (Individual user version), quick start guide, calibration slide, stirrer-spoon, dropper, forceps, experiment manual, and soft storage case. The Digiscope DS-300 brings high resolution digital capture technology to your classroom at a very affordable price. Specially designed for young students, the easy-to-use scope allows you to capture images or video clips in field or lab, then display them on Windows or Macintosh computers or projection devices. Motic Play image capture software (included) provides tools for image measurement, labeling, and manipulation. The upper half of this two-piece system is a USB camera that can be removed so you can use the microscope separately. The camera is powered by the USB port of your computer. Built-in LED lights provide efficient upper and lower illumination - up to 50 hours on 3 "AA" batteries (not included). The DigiScope DS-300 is easy to use, precise, accurate, and durable. Plus, a free virtual lab Teacher Resource CD-ROM brings science alive for your students. Resolution: 640 x 480 pixels Magnification: 20x - 100x (70x - 350x on screen) Focus Range: 30mm Working Distance: 22mm to 42mm Size: 7"H x 5"W x 4.5"L

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$124.90 Each $249.95 Each
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Digiscope Discovery Pack - Network Version
Digiscope Discovery Pack - Network Version
16751

Package includes DigiScope DS-300, Exploring with a Digital Microscope curriculum guide CD-ROM (Network version - unlimited users in one building), quick start guide, calibration slide, stirrer-spoon, dropper, forceps, experiment manual, and soft storage case. The Digiscope DS-300 brings high resolution digital capture technology to your classroom at a very affordable price. Specially designed for young students, the easy-to-use scope allows you to capture images or video clips in field or lab, then display them on Windows or Macintosh computers or projection devices. Motic Play image capture software (included) provides tools for image measurement, labeling, and manipulation. The upper half of this two-piece system is a USB camera that can be removed so you can use the microscope separately. The camera is powered by the USB port of your computer. Built-in LED lights provide efficient upper and lower illumination - up to 50 hours on 3 "AA" batteries (not included). The DigiScope DS-300 is easy to use, precise, accurate, and durable. Plus, a free virtual lab Teacher Resource CD-ROM brings science alive for your students. Resolution: 640 x 480 pixels Magnification: 20x - 100x (70x - 350x on screen) Focus Range: 30mm Working Distance: 22mm to 42mm Size: 7"H x 5"W x 4.5"L.

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$134.90 Each $269.95 Each
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Disc Neodymium Magnet (1" Thick x 7/8" Diameter)
Disc Neodymium Magnet (1" Thick x 7/8" Diameter)
14594

Neodymium (NdFeB) is the most powerful magnet material in the world. Neodymium is classified as an element in the lanthanides section of the Periodic Table. These are the super strong magnets you have heard about that can attract through your hand.

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$7.60 Each $15.25 Each
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Disc Neodymium Magnet (1/4" Thick x 1/8" Diameter)
Disc Neodymium Magnet (1/4" Thick x 1/8" Diameter)
14592

Neodymium (NdFeB) is the most powerful magnet material in the world. Neodymium is classified as an element in the lanthanides section of the Periodic Table. These are the super strong magnets you have heard about that can attract through your hand.

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$0.10 Each $0.35 Each
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Disecto-Flex Pad only for Econo Poly Pan
Disecto-Flex Pad only for Econo Poly Pan
16372

Disecto Flex-Pad is washable, long lasting, has a smooth surface, is clean, removable, odorless and pins do not require cleaning after use.
Disecto Flex-Pad is washable, long lasting, has a smooth surface, is clean, removable, odorless and pins do not require cleaning after use. For econo poly pans.

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$3.40 Each $6.95 Each
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Dish Tongs
Dish Tongs
11884

Easily handles evaporating dishes hollow articles, etc., from 3" to 4 3/4" (75mm to 120mm). Stainless steel with riveted joints. Length 9 1/2".
Easily handles evaporating dishes hollow articles, etc., from 3" to 4 3/4" (75mm to 120mm). Stainless steel with riveted joints. Length 9 1/2".

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$7.90 Each $15.95 Each
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Disposable PonchosDisposable Ponchos
Disposable Ponchos
SS262P

• .02mm polyethylene disposable poncho, yellow
• Attached hood
• Fits easily into pocket, tool box, or glove compartment
• Available in 3 colors
• One size fits all

These lightweight disposable ponchos with attached hood are made from .02mm thick polyethylene material and are available in yellow, orange and clear material. Ponchos are easy to put on and take off and especially easy to store. Put a light one in your pocket when you go see your favorite football game, or put a couple in your tent for those outdoor activities. One size fits all.  50" x 80". Sold individually.

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$0.70 Each $1.50 Each
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Dissecting Scissors
Dissecting Scissors
11453

4 1/2" student grade, ground edges, good quality.

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$0.53 Each $1.75 Each
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Dissection Guide to the Clam
Dissection Guide to the Clam
13790

9 pages. 7 color illustrations

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$2.39 Each $7.95 Each
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Dissection Guide to the Crayfish
Dissection Guide to the Crayfish
13792

6 pages. 4 illustrations

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$2.39 Each $7.95 Each
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Dissection Guide to the Earthworm
Dissection Guide to the Earthworm
13791

8 pages. 3 color illustrations

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$2.39 Each $7.95 Each
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Dissection Guide to the Fetal Pig
Dissection Guide to the Fetal Pig
13797

16 pages. 11 illustrations

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$2.69 Each $8.95 Each