Description

and an 18mm attachment diameter for pulling small weights in mechanical-advantage experiments

6mm central pinhole

this Wimshurst generator builds a visible high-voltage spark

Three-hundred-thirty-ohm 0

Mason's Hygrometer with Wet and Dry Bulb, Wall-Mounted Racks & Stands_Test Tube Racks and an 18mm attachment diameterWall mounted Mason's hygrometer with two identical dual scale thermometers one dry and one kept wet via a water reservoir calculating relative humidity from their paired reading difference.

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Mason's Hygrometer with Wet and Dry Bulb, Wall-Mounted Racks & Stands_Test Tube Racks and an 18mm attachment diameter

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