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Leyden Jar
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$
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For demonstration of the basic principle of capacitance. Consists of two cylindrical, aluminum, conducting cups, one placed inside the other and separated by an insulating, dielectric, plastic cup. The inner cup has an aluminum rod, which terminates in an aluminum ball. The apparatus can be easily taken apart. Once charged while assembled, it retains its charge even after disassembly and reassembly. With instructions.
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Dry Form Electric Field Map Apparatus
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$
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Different types of electrode configurations can be drawn using a conducting-ink pen on semi-conductive paper, and their electric field characteristics can be studied. These can be transcribed onto white grid paper, which provides reproducibility of results and can be used many times. Kit consists of one cork-board base, 25 semi-conductive black paper sheets with a 20 × 25-cm grid, 100 white sheets with a 20 × 25-cm grid, a conducting-ink pen, 4 connecting leads with crocodile clips, one template for drawing different shapes of electrodes, and push pins. With instructions.
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Electrodes, Assembled, for Electroscope, Pk/3
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$
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Used with an electroscope kit. Each electrode consists of an aluminum rod fixed through a rubber cork. One end of this rod is threaded to hold a ball or disc terminal, and other end has a brass hook for suspending foil leaves. Set comes with 6 pairs aluminum foils and 3 aluminum, ball terminals. With instructions.
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Electroscope, Aluminum Leaf
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$
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In metal case. Sturdy, cast-alloy metal case has a removable, clear-glass front and ground-glass back. Pair of thin aluminum leaves suspended through a hook supported by a brass rod. The brass rod is connected to a brass disc-terminal at the top through an insulated bush. The electroscope has a built-in scale to indicate deflection of leaves. Earthing socket provided. With instructions.
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Electroscope Kit
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$
0.00
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For experiments of electroscopes and other related studies such as electrostatic induction, the nature of charge in a body, Faraday’s ice-pail experiment, etc. Pair of flask-type electroscopes, two each disc- and ball-terminals, one Faraday’s ice-pail. Spare foil-leaf pairs included. With instructions.
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Faraday Cage Kit
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$
0.00
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For demonstrating that electrostatic charge resides completely on the outer surface of a hollow conductor, and that there is no charge inside the enclosed space. Painted, iron-mesh cylinder can accommodate our electroscope no. 2800 (not included) inside. Complete with two each metallic and plastic caps for both ends, and a mounted point. With instructions.
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Electrostatic Charge Kit
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$
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For the study and demonstration of electrostatic behavior of various substances, electrostatic attraction, repulsion, and induction. The kit contains six friction rods of different materials — glass, PVC, acrylic, ebonite, polypropylene, and nylon. Also included are silk and woollen cloths, styrofoam pith balls, electrophorus, proof-plane, an electrically conducting plastic ball, and a neon lamp. With instructions.
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Discharge Sphere on Stand for Van de Graff Generator
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$
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For use with 2806. Polished aluminum dome is mounted on an insulated pillar fixed on a metal base. A connecting lead with banana plugs at both ends for connection of Van de Graff generator to the sphere is provided. Unit is connected to Van de Graff generator for increasing the intensity, length, and sound of spark due to addition of capacitance. Can also be used separately as a charged sphere for transferring electrostatic charges. With instructions.
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Pith Balls on Rod
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$
0.00
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For use with 2806. Demonstrates electrostatic attraction and repulsion. An insulating pillar with pith-balls hanging from it can be fitted on Faraday’s pail, no. 2804J, below. With instructions.
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Electric Whirl
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$
0.00
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For use with 2806. Three L-shaped metal spokes mounted on an insulating stand. When brought near a charged Van de Graff generator, the spokes spin rapidly.
With instructions.
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Electric Plume
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$
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For use with 2806. A set of colored ribbons is mounted on a small stand with a vacuum rubber-base that can be adhered to any surface. When the generator is operated after adhering the plume at the top of the dome, the ribbons on the plume spread out, repelling each other. With instructions.
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Lightening Plate
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$
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For use with 2806. Demonstrates that an electric discharge will follow the path of least resistance even though this path may be longer than a direct path. Small, metallic leaves arranged in a zig-zag fashion on an insulating plate, with a small gap between each adjacent leaf. Clip at each end—one for suspending the plate on an insulating stand (no. 2804G ; not included) and connecting it to the earth, and the other for connecting to the Van de Graff generator. When connected to the generator, high-voltage electricity jumps across the gaps in the form of sparks. Requires insulating stand, no. 2804G, for use. With instructions.
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Racing Ball
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$
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For use with 2806. Shown with our insulating stand, no. 2804G. A lightweight, insulating ball is loosely placed between two metallic discs that have a circular wire loop at the top. On operating the generator after connecting the accessory, the ball gradually starts moving, and then racing continuously along the bent rim of the lower pan. Requires insulating stand, our no. 2804G, for use. With instructions.
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Insulating Stand
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$
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(See 2804F for photo.) Required for use with accessories such as racing ball, no. 2804F, and the lightning plate, no. 2804E. An insulated stand to support and insulate electrostatic accessories. Mounted on a metal base. The stand has a hook on which a lightening plate, no. 2804E, can be suspended. With instructions.
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Hollow Cylinder
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$
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For use with 2806. Shows that electric charge lies on the outer surface of a charged hollow conductor, and not on its inner surface. Consists of a metallic, cylindrical shell mounted horizontally on an insulating stand. A metal ball is mounted vertically over the hollow cylinder. From the metallic ball are hung four pith balls—two suspended inside the hollow cylinder, and two above and outside the cylinder. Upon bringing the metallic ball in contact with a charged sphere, the balls inside the hollow cylinder remain unaffected, whereas the ones outside are repelled away from the cylinder. With instructions.
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Volta's Hail Storm
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$
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(See 2804B for photo.) For use with 2806. Consists of a perspex cylinder covered on one side by a metal cap, and on the other, with a bakelite cap. With pith balls inside. When charge is given through the dome of the Van de Graff generator to the metal cap, the pith balls start dancing around randomly. Requires insulating stand, no. 2804G. With instructions.
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Faraday's Pail with Peg
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$
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(See 2804B for photo.) For use with 2806. Shows absence of charge inside a hollow conductor, when used with our pith ball rods, no. 2804B. An aluminum can has a pin at the bottom that can be plugged into the dome of the generator. With instructions.
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Head of Hair
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$
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(See 2804B for photo.) For use with 2806. When mounted on top of the dome of the Van de Graaf generator, and the generator is subsequently operated, the hair will stand apart on their ends. The hair, after being charged, start repelling each other, showing that like charges repel each other. With instructions.
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Neon Bulb
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$
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(See 2804B for photo.) For use with 2806. When a small neon bulb is brought near the charged dome of the Van de Graaf generator, it will begin to glow. This is because of the small current passing through air ionized by the dome, which in turn is received by the bulb. With instructions.
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Point Discharger
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$
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(See 2804B for photo.) For use with 2806. An L-shaped metal rod with one end pointed demonstrates the property of pointed conductors to collect and discharge electric charge. Also suitable for demonstration of electric wind.
With instructions.
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Van de Graaf Generator, Kit Form
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$
0.00
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As 2806, but in kit form.
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Van de Graaf Generator
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$
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For use in electrostatic experiments. Motor driven, 110V AC. The motor operates at speeds up to 2400 r.p.m. Complete with removable, vertical insulator, flat rubber belt, polished and detachable metal dome of approximately 7-inch diameter. Also includes 4mm sockets in dome and base to attach various accessories. Under favorable weather conditions, the generator can give a spark to 4", yielding a potential difference of approx. 100,000V. Ready for working with 1.5mm of 3-core mains cable. For discharging the unit, the discharge wand may be used (sold separately as 2807). Instructions included.
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Discharge Wand for Van de Graaf Generator
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$
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Used for discharging the charged dome of a Van de Graff generator. Polished, aluminum dome mounted on an insulating handle, is used as a discharger. Supplied with a lead that has banana plugs at each end for connecting to the generator. With instructions
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Belt only, for Van de Graaf Generator
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$
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Wimshurst Static Generator
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$
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Classic electrostatic generator can produce spark up to 3" under favorable weather conditions. Two circular, 24-cm, acrylic plates have aluminum sectors pasted on their surface along the rim. Plates mounted parallel to each other and rotated with a handle-and-belt system in opposite directions. Jointless rubber belts with circular cross-sections for smooth running. The static charge generated is conducted to a pair of Leyden jars through metal brushes and gets accumulated on the pair of ball-shaped dischargers. When the potential build-up between the two dischargers is sufficiently high, a transfer of charge takes place in the form of an electric spark that jumps from one ball to another. Spark produced intermittently by the continuously-rotating plates. Complete apparatus mounted on a wooden base. Earthing terminals for Leyden jars. With instructions.
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Belts, Pair, for Wimshurst Generator
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$
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(See 2813 for photo.) Made of rubber. Without joint. Sold in pairs.
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Brushes, Set/4, for Wimshurst Generator
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$
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(See 2813 for photo.)
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