Tuning forks made from alluminum alloy. The frequency and leter scale is stamped on each fork.

These uncalibrated specific gravity bottles are excellent for determining the specific gravity of liquids. The borosilicate bottles have a ground stopper joint for a precision fit. Available in 10 ML or 25 ML sizes.

Includes 1 each of 1, 5, 10, 50, 100, and 500 mg weights, and 2 each of 2, 20, and 200 mg weights. Rectangular plastic box with rider and forceps.

We offer a superior quality Wimshurst machine for demonstrating high voltage electric charges. Our unit features acrylic rotating disks, good quality foil strips and brushes, insulated cylindrical capacitors, and a durable plastic platform. Guaranteed to produce large sparks for easy…

Featured displays of this electronic alarm stopwatch include time (hours-minutes-seconds, with 12 or 24 hour mode option), calendar, 24-hour stopwatch, alarm, hourly chime, 1/100 second chronograph, split time, and total time. It is lightweight, easy to operate, ad comes complete with battery and…

Made from plate glass about 2mm thick with highly silvered back.

This simple and ingenious device quickly and graphically shows students how different metals conduct heat at different rates. It consists of four identically-sized bars of common metals - steel, brass, aluminum, and copper - mounted parallel to one another in a plastic support. Attached to each bar…

Set of 9 weights consisting of 1 each 10g, 50g, 100g, 500g, 1000g, and 2 each 20g, and 200gram weights. Weights are made of cast iron with a black enamel finish. Replacement weights are available separately.

Quality linear gratings protected by two glass plates, 60mm x 45mm. Viewing area measures approximately 37mm x 20mm. The DFG525-pk/5 Diffraction Gratings in Slide Viewers has a viewing area of 35mm x 25mm.

Folding Magnifiers in plastic cases. 25mm lens, 5x magnification. Double magnifier has two lenses for 10x magnification and triple magnifier has three lenses for 15x magnification.

A natural rock that contains traces of iron ore with natural magnetic properties.

Reliable and dramatic demonstration of the magnetic force between two current-carrying parallel conductors. Safely applies a large current to two pivoting brass tubes. Fuse protected. This product has a 90 day lead time. Market standard for this type of product.

This magnifier offers an extra large field of view, hands free use, and folds down to a compact size for storage. Its 10cm lens provides 6x magnification. Ideal for use on a lab table, and for dissecting small specimens like owl pellets.

This excellent instrument is easy to set up and easy to use and is designed for students to make precise measurements. This unit features high quality 22MM optics, a built-in illuminated auto-collimator for fast set up, a 17.8 cm diameter divided circle with clear gradations, a double-ended vernier…

This complete set includes an inclined plane with a pulley and protractor, a Hall's carriage, a hanging pan to hold the desired weight, two wooden boards of different sizes, and a metal plate. The set is used to demonstrate the resolution of forces on an inclined plane, uniform and accelerated…

This measuring set contains four high quality instruments-a 0-25 x 0.01 MM micrometer caliper, a 90 degree knife edge square, a 150 x 0.05 MM vernier caliper, and a 150 MM steel ruler. All of these are housed in a sturdy plastic storage case.

This 3V conductivity tester demonstrates the electrical properties of various liquids. The item consists of a molded plastic lamp socket mounted on a base with 2 binding posts for connecting a wire cord. It comes complete with bulb, glass tumbler, and instruction manual.

A comprehensive set of mechanical vibration and wave motion apparatus based on a sturdy, reliable vibration generator that can be used with any frequency generator that can deliver a signal of up to 1A. The piston delivers an amplitude of up to 7 mm, depending on the load and frequency. The…

Weights are made of brass, with nickel plated surfaces. All weights are carefully tested and calibrated. Analytical Weight Box contains a total of 9 weights from 1 to 100 grams, in polished wooden box, with fractional weights, rider and forceps.

Convenient, economical package of materials to start investigating electricity concepts. Assortment includes: 6 Round Plastic Bulb Holders, 3 Knife Switches, 6 Battery Holders with Fahnestock Clips, 10 Fahnestock Clips, 1 Wire Stripper, 3 Wires with Alligator Clips, 18"; Assorted Colors, 3 Wires…

This instrument is an enhanced version of our popular Intermediate Spectrometer.  Its larger 30mm diameter optics give brighter line images and make precise measurements easier.  The optical focusing system has also been refined and the instrument retains the same premium features as the…

This apparatus helps students to observe energy transfer and conversion and investigate the systems that keep homes comfortable and safe. The suggested activities below will: explore the relationship between parallel circuits and current; understand how thermostats and circuit breakers operate; and…

Utilize the power of your smartphone with this unique Hall’s Carriage. The secure clip holds your smartphone securely for motion experiments. Using an app of your own choosing, you can graph acceleration and velocity. Includes activity guide. Secure clip holds your smartphone securely for…

Constructed of clear acrylic with highly polished surfaces, these prisms are ideal for projecting a clear, sharp spectrum. Set of Right-Angled Prisms consists of 25mm, 50mm, and 75mm long prisms.

Made from Acrylic about 3mm thick, with highly silvered back.

These superior quality, yet economical prisms and lenses can be used to teach a wide variety of optical principals. This set is housed in a wooden case and includes a detailed teacher activity guide.

We offer a variety of economical ceramic bar, disc, and ring shaped magnets. Magnets are upainted, except where noted.

This comprehensive kit allows students to plot equipotential lines in an electric field between two electrodes held at different electric potentials. A simple setup keeps electrodes partially immersed in water containing an electrolyte, allowing a small current to flow between the…

The Loop the Loop Track demonstrates centripetal acceleration and the transformation of potential energy into kinetic energy. Included is a sturdy base with rubber feet, metal ramp with loop, 16mm steel ball and 19mm steel ball. The metal ramp with loop features a net at the end of the loop to…

Discover how people communicated over long distances before the telephone was invented. The Morse code experiment kit is designed to show the principle of a telegraph. The kit consists of a "D" cell battery holder, a telegraph key, a miniature lamp with holder, and three connector cords.…

The Phase and Group Velocity Apparatus (oscilloscope not included) uses sound waves in the ultasonic region to clearly illustrate and distinguish the often poorly understood phase and group velocity concepts. It permits precise measurements of the velocity of sound in up to three different liquids…

Laser experiments in reflection, refraction and diffraction are staples in physics. Holding the laser steady, and in the proper position, is important for experimental consistency. This apparatus that allows you to securely hold a laser pointer at any angle and the clip can hold the toggle button…