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Electromagnetic tuni	Sound tube	Kund's tube	Tuning fork 1700 Hz
Ramsden Machine	National Historical	Apparatus for the co	Gaiffe's millim
Voltmeter- Amperemet	G.Campostano's	Voltometer- Ampereme	W.B. Nicoloson'
Ferranti's Vol	Millimeter - Ferrant	Millimeter - Simson	Retort
Davy lamp	Parabolic Reflector	Apparatus for studyi	Horizontal steam eng