Brass Ring and Ball for Thermal Expansion Demonstration Type_Low Form these concavity microscope slides hold

these concavity microscope slides hold liquid samples for hanging-drop preparations and observation of specimens in suspension

Economical minute timer setting intervals up to one hour via a top knob

integrating directly into circuit demonstration builds without soldered leads

Used as a sensitive direction-finder when paired with a tangent-compass stand

this 18 SWG bare constantan wire on a 125g reel relies on the alloy's low temperature coefficient

Brass Ring and Ball for Thermal Expansion Demonstration Type_Low Form these concavity microscope slides holdBuilt for the classic thermal expansion demonstration, this brass ball and ring fit freely at room temperature and stick tight once the ball is heated and expanded.