Potassium Iodide, lab grade, granular - 25g.
These black stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions. Low sulfur content. Withstand temperatures from –25 to 70°C (–13 to 158°F). Also available in solid and two-hole versions. Each stopper has its size marked in raised figures. Sold as one-pound bags.
These black stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions. Low sulfur content. Withstand temperatures from –25 to 70°C (–13 to 158°F). Also available in one-hole and solid versions. Each stopper has its size marked in raised figures. Sold as one-pound bags.
These black stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions. Low sulfur content. Withstand temperatures from –25 to 70°C (–13 to 158°F). Each stopper has its size marked in raised figures. Sold as one-pound bags.
These black stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions. Low sulfur content. Withstand temperatures from –25 to 70°C (–13 to 158°F). Also available in one-hole and two-hole versions. Each stopper has its size marked in raised figures. Sold as one-pound bags.
Power unit with infinitely variable control unit. Plug in Class-2 Transformer. Input AC 120 V 60 Hz 150mA. Output :DC 9V 1A. Ideal for powering stationary fischertechnik models.
• Concealed under brim technology
• 2 LEDs pointing outward for distance applications
• 2 LEDs angled downward for close and medium task applications
• 48 lumens of light output - twice the light output of any lighted cap on the market.
• 43 hours run time.
• 13 meters forward lighting.
• 4 way switch
• Solid colored cap, 100% polyester fleece. 97% polyester/3% spandex.
• Four replaceable lithium CR-2032 batteries.
• One size fits most.
Concealed under brim technology takes lighted headwear to a new level of functionality. Now the POWERCAP Stealth 2575 has expanded on this technology to provide the market with the most advanced lighted cap ever. 4 way switch available again. When you click the button, two lights turn on, click again, two different lights turn on, click again, all 4 lights on, click again, all 4 lights turn off. Delivers twice the light output of any lighted cap on the market. 4 ultra-bright LEDs: 2 LEDs pointing outward for distance applications and 2 LEDs angled downward for close and medium task applications. 48 lumens of light output. 43 hours run time. 13 meters forward lighting. Adjustable hook and loop tape closure. Solid colored cap, 100% polyester fleece. 97% polyester/3% spandex. Four replaceable lithium CR-2032 batteries. One size fits most.
• Combines Ultra Bright LED technology with ANSI rated yellow safety material
• The perfect hands free flashlight.
• Yellow microfiber hat with reflective grey trim that let’s you be seen from all angles
• Perfect for walking or working at night
• 4 LED’s provide more than 48 Lumens and are concealed under the brim
• When you do click the easy on/off switch under the brim, you’ll notice that
• 2 LED’s are angled down 25 degrees to light up your hands for close up tasks
• 2 LED’s are aimed forward to light the distance up to 42 feet away.
• 4 CR2032 Coin Cell batteries are hidden in the sweatband and are easily replaceable
• 43 hours of battery life
POWERHAT LED Lighted Safety Hats Combine Ultra Bright LED technology with ANSI rated yellow safety material to provide you with the perfect hands free flashlight. The Yellow microfiber hats have reflective grey trim that let’s you be seen from all angles. Perfect for walking or working at night, you can rest assured that you will be easy to see. The 4 LED’s provide more than 48 Lumens and are concealed under the brim so the hat looks just like any other hat until you need to turn them on. When you do click the easy on/off switch under the brim, you’ll notice that 2 of the LED’s are angled down at 25 degrees to light up where your hands are for close up tasks, while the other 2 LED’s are aimed forward to light the distance up to 42 feet away. 4 CR2032 Coin Cell batteries are hidden in the sweatband, provide up to 43 hours of life and are easily replaceable.
Helps students understand how and why gyroscopes are used for many guidance systems. This is a well-balanced, high quality gyroscope with adjustable bearings. The accessories include plastic gimbals, rocker and pivoting housing. This unit measures 100m x 190mm. Instructions provided.
Helps students understand how and why gyroscopes are used for many guidance systems. This is a well-balanced, high quality gyroscope with adjustable bearings. The accessories include plastic gimbals, rocker and pivoting housing. This unit measures 100m x 190mm. Instructions provided.
Slides include: Amoeba proteus, w.m.; Hydra, w.m.; Earthworm, c.s. of posterior; Daphnia and cyclops, w.m.; Housefly head with mouthparts, w.m.; Housefly leg with clinging pads; Mouth smear, squamous epithelium; Straited muscle, l.s.; Human blood smear; Bacteria, smear from mouth; Diatoms, mixed, w.m.; Spirogrya, vegetative filaments, w.m.; Aspergillus, w.m.; Aspergillus, w.m.; Moss stem with leaves, w.m.; Buttercup root, c.s.; Corn stem, c.s.; Lily anthers, c.s.; Lily ovary, c.s.; Onion epidermis, w.m.; Onion root tip, l.s., mitosis; Human scalp, vertical sections; Compact bone, c.s.; Sunflower stem, c.s.; Lilac leaf, c.s.; Honeybee anterior and posterior wing.
This prepared slide kit contains 25 ready-to-view biology slides in a wooden case. The case has numbered slots and a numbered contents sheet for identifying the slides, and holds the slides securely for storage. This slide kit is suitable for biological microscopic study. Slides include: Amoeba proteus, w.m.; Hydra, w.m.; Earthworm, c.s. of posterior; Daphnia and cyclops, w.m.; Housefly head with mouthparts, w.m.; Housefly leg with clinging pads; Mouth smear, squamous epithelium; Straited muscle, l.s.; Human blood smear; Bacteria, smear from mouth; Diatoms, mixed, w.m.; Spirogrya, vegetative filaments, w.m.; Aspergillus, w.m.; Aspergillus, w.m.; Moss stem with leaves, w.m.; Buttercup root, c.s.; Corn stem, c.s.; Lily anthers, c.s.; Lily ovary, c.s.; Onion epidermis, w.m.; Onion root tip, l.s., mitosis; Human scalp, vertical sections; Compact bone, c.s.; Sunflower stem, c.s.; Lilac leaf, c.s.; Honeybee anterior and posterior wing.
Slides include: Mitosis in plants; Pollen grains, w.m.; Amoeba, w.m.; Yeast cells, w.m.; Green algae/Spirogyra, w.m.; Letter "e"; Tape worm,t.s.; Silk fabric, w.m.; Lily leaf, v.s.; Mammal lung, t.s.; Meiosis in animals; Aves feather, w.m.; Lily stamen, t.s.; Mammal hair, w.m.; Mosquito mouth parts, w.m.; Housefly mouth parts, w.m.; Frog blood smear; Human blood smear; Onion cells, w.m.; Hibiscus stem, t.s.; Wool fabric, w.m.; Fish scale, w.m.; Skeletal muscle, w.m.; Herbaceous stem, young, t.s.; Skin cells, v.s.
This prepared slide kit contains 25 ready-to-view slides of plant and animal tissue in a wooden case. The case has numbered slots and a numbered contents sheet for identifying the slides, and holds the slides securely for storage. This slide kit is suitable for general microscopic study. Slides include: Mitosis in plants; Pollen grains, w.m.; Amoeba, w.m.; Yeast cells, w.m.; Green algae/Spirogyra, w.m.; Letter "e"; Tape worm,t.s.; Silk fabric, w.m.; Lily leaf, v.s.; Mammal lung, t.s.; Meiosis in animals; Aves feather, w.m.; Lily stamen, t.s.; Mammal hair, w.m.; Mosquito mouth parts, w.m.; Housefly mouth parts, w.m.; Frog blood smear; Human blood smear; Onion cells, w.m.; Hibiscus stem, t.s.; Wool fabric, w.m.; Fish scale, w.m.; Skeletal muscle, w.m.; Herbaceous stem, young, t.s.; Skin cells, v.s.
Comprising a primary coil of insulated copper wire wound on a cylinder and fitted with terminals, together with a secondary coil of fine insulated copper wire wound on a cylinder into which the primary coil may be fitted. A soft iron core, for inserting in the primary coil, is included. To demonstrate the concept of induced current and with the soft iron core the electromagnetic effect can also be demonstrated.
Comprising a primary coil of insulated copper wire wound on a cylinder and fitted with terminals, together with a secondary coil of fine insulated copper wire wound on a cylinder into which the primary coil may be fitted. A soft iron core, for inserting in the primary coil, is included. To demonstrate the concept of induced current and with the soft iron core the electromagnetic effect can also be demonstrated.
They can start with basic math operations and work their way up to more advanced concepts such as percents and square roots. This dual-powered, four-function calculator includes auto shut-off, 3-key memory and more. Measures 4 1/2" x 2 1/2" Grades Pre K +
They can start with basic math operations and work their way up to more advanced concepts such as percents and square roots. This dual-powered, four-function calculator includes auto shut-off, 3-key memory and more. Measures 4 1/2" x 2 1/2" Grades Pre K +
These calculators can start with basic math operations and work their way up to more advanced concepts such as percents and square roots. This dual-powered, four-function calculator includes auto shut-off, 3-key memory and more. Measures 4 1/2" x 2 1/2" Grades Pre K +
These calculators can start with basic math operations and work their way up to more advanced concepts such as percents and square roots. This dual-powered, four-function calculator includes auto shut-off, 3-key memory and more. Measures 4 1/2" x 2 1/2" Grades Pre K +
Four-function, dual-powered calculator fits on the overhead to teach basic math operations, percents and square roots to an entire class. Includes auto shut-off, three-key memory and more. Measures 4 1/4" x 6 1/8" Grades PreK +
Four-function, dual-powered calculator fits on the overhead to teach basic math operations, percents and square roots to an entire class. Includes auto shut-off, three-key memory and more. Measures 4 1/4" x 6 1/8" Grades PreK +
Prism Crown Glass refractive index 1.51. For Spectrometer (15864), and general refraction experiments. Equilateral 32 mm Sides.
Prism Crown Glass refractive index 1.51. For Spectrometer (15864), and general refraction experiments. Equilateral 32 mm Sides.
This fluorescent yellow armband provides high visibility day or night, has sonic wedged edges, and is water resistant. Imprinted with "Crossing Guard" in black.
Boxed set of high-quality acrylic prisms, made from clear acrylic sheet, all side polished. The set consists of six prisms in a variety of shapes. Includes: 1 rectangular block (75mm x 50mm x 15mm), 1 semi-circle (90mm base x 15mm thick), 1 equilateral prism (75mm sides, 15mm thick), 1 double convex lens (90mm long, 23mm at center), and 2 double concave lenses (90mm long, 10mm at center).
Boxed set of high-quality acrylic prisms, made from clear acrylic sheet, all side polished. The set consists of six prisms in a variety of shapes. Includes: 1 rectangular block (75mm x 50mm x 15mm), 1 semi-circle (90mm base x 15mm thick), 1 equilateral prism (75mm sides, 15mm thick), 1 double convex lens (90mm long, 23mm at center), and 2 double concave lenses (90mm long, 10mm at center).
The Project Planetarium is ideal for individual study projects. Causes of 2 day and night, seasonal changes, phases of the moon, and planet locations are easily understood. The small planetarium model and solar system chart, 22"x17", may be set to show actual positions of the earth, the moon and planets at any given time. Each set includes planetarium, chart and study guide.
The Project Planetarium is ideal for individual study projects. Causes of 2 day and night, seasonal changes, phases of the moon, and planet locations are easily understood. The small planetarium model and solar system chart, 22"x17", may be set to show actual positions of the earth, the moon and planets at any given time. Each set includes planetarium, chart and study guide.
In Properties of Gases, students are introduced to kinetic molecular theory and learn about the physical relationships that exist between temperature, pressure, volume and density in gases. Students will see how the gas laws apply to living systems by developing an experimental design to measure the production and consumption of oxygen and carbon dioxide during cellular respiration. Part of the multivolume Science Lab Investigations! DVD Series. Includes a Teacher's Guide.
Developed by the same teacher who created our DNA Manipulatives kit, this package includes colorful, large DNA, mRNA, ribosome, tRNA and amino acid models that attach to the blackboard. Teachers use these models to simulate the protein synthesis process, and students are provided with smaller size models for hands-on learning about the process and key concepts. As part of the activities, each student is given a unique DNA sequence and is asked to identify the resulting amino acid sequence. Kit also includes an instructional CD. Adequate for a class size of 40 students with students working in groups of two.
Developed by the same teacher who created our DNA Manipulatives kit, this package includes colorful, large DNA, mRNA, ribosome, tRNA and amino acid models that attach to the blackboard. Teachers use these models to simulate the protein synthesis process, and students are provided with smaller size models for hands-on learning about the process and key concepts. As part of the activities, each student is given a unique DNA sequence and is asked to identify the resulting amino acid sequence. Kit also includes an instructional CD. Adequate for a class size of 40 students with students working in groups of two.