Commonly known as "eye-droppers", these are glass pipettes with a black rubber bulb. Four 41/2" long pipettes per pack.
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A very handy rotating star, planet and constellation plotting map. Just turn the inner map until the time of day (or night, rather!) matches the da...
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The microscope model that sets the standard for high school instruction, now with cool, long life LED illumination. Includes all the most commonly ...
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label and color each planet and complete information about the solar system. ...
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Instructions, illustrations, and plenty of information are contained within this book. Instructions for dissecting earthworms, crayfish, grasshoppe...
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