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537 items

Telegraph Recorder

This telegraph recorder used tape to record dots and dashes. It is missing its stylus.

Toepler-Holz Electrostatic Machine

Grant thought this came from Davenport.

Leyden Jar

This jar can be disassembled and the inner liner can be removed.

Rotator with Governor

Table and all attachments cost $40. Apparatus includes rotator table, Rotator part with brass circles to show shape of rotating earth, other Rotator part demonstrating centrifugal force (like Watt governor), Doppler whistle, and Rotator crank wheel.

Glass sphere on Wood Base

This may be a discharge tube.