Electrometer spare disc

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ID:	NAV0960.2
Type:	Electrometer spare disc
Display location:	Not on display
Creator:	Unknown
Date made:	Unknown
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Diameter: 58 mm;Overall: 11 mm
Parts:	Portable Electrometer No.51 (Electrometer) Electrometer sliding magnifier (NAV0960.1) Electrometer spare disc (NAV0960.2) Electrometer spare disc (NAV0960.3) Electrometer part (NAV0960.4) Electrometer glass insulated rod (NAV0960.5) Electrometer rolled paper rod (NAV0960.6) Electrometer rolled paper rod (NAV0960.7) Electrometer rolled paper rod (NAV0960.8) Electrometer box (NAV0960.9)