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Make your own timer as you discover how a pendulum clock works
movable by rack and pinion mechanism
1 light bulb
This set of 15 includes 15 lesson plans with microslides
Protozoa/Blepharisma (200x) / Suctorian (200x)
Supertek Microslide® Viewer Kits Make your own timer asThe Supertek Microslide Viewer is a precision device used to view Supertek Microslide photographic slide strips at magnifications from whole mounts to 450,000x. It is not a microscope. Made from high impact polystyrene with no painted or removable parts, it uses ambient light, has 2 adjusting knobs for sharp focusing, and is completely washable. Size, 9" H.
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