Ginsberg Scientific Inc.

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US$1.05

These superior quality unmounted Double Convex Lenses with ground edges are useful for teaching a variety of optical principles.

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US$1.10

These superior quality unmounted Double Concave Lenses with ground edges are useful for teaching a variety of optical principles.

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US$22.72

This is a 7 piece Acrylic Lens and Prism Set, with one surface frosted to help reveal the path of light.

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US$33.33
This is a 7 piece Glass Lens and Prism Set, with one surface frosted to help reveal the path of light.
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US$2.30
These magnifiers have a chrome rim and plastic handle.
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US$1.27
This is a Plexiglass Mirror Silver Backed, 2-1/2" x 3-1/2". Mirrors are great for numerous applications. They demonstrate reflection and refraction simply and effectively. Mirrors are an easy way to teach the principles of optics.
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US$5.94

This is a Glass Spherical Mirror silver backed concave/convex, 7.5cm D x 25cm FL.

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US$0.77

These are economical Glass Mirrors are silver backed with ground edges and are great for all types of optical applications.

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US$11.28

Includes: Scalpel handle with blade #22. Probe and Seeker. Two Teasing Needles bent and straight with wood handle. Medicine Dropper. Dissecting Scissors. Cartilage Forceps. 6" Plastic ruler. Items are chrome plated and packaged in a leatherette case. 

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US$8.55

These are pre-cleaned glass Microscope Slides with smooth ground edges are inexpensive and excellent quality. Size of slides: 25.4 x 76.2mm; 1.0-1.2mm thick.

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US$27.50
Includes: Three friction rods: one hard rubber, one hollow glass and one half ground glass. Four pads: one fur, one flannel, one silk, and one wool. 3 balloons and 10 feet of string. Instructions provided. (8-1/4" 1").
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US$19.25
This allows you to experiment with Transformer Principles and Induction. The outer coil is 4-1/2" tall and 2-3/4" in diameter. The inner coil is 3-3/4" tall and 1-1/4" in diameter. The removable steel core with handle is 1/2" in diameter and 5-1/2" tall. All coils are wrapped with 20-gauge magnet wire with insulated binding posts as connectors. 
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US$75.85
This is an amazing demonstration of the power of electromagnetism, capable of lifting up to 200 pounds. A strong enamel-covered electromagnet powered by four 1.5 volt C batteries. Equipped with alligator clip leads approximately 6" in length. The unit measures 75mm diameter x 260mm length. Batteries not included. Instructions provided.
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US$1.42
This is a SPST Knife Switch with Screw Type Binding Posts for a solid electrical connection, (4-1/2" x 2-1/2" x 1").
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US$2.59
This is a SPST Knife Switch with Spring Type Binding Posts for a quick electrical connection, (4-1/2" x 2-1/2" x 1").
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