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Artificial Telephone Cable: Post Office Pattern

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Bridge for Platinum Thermometry: Callendar and Griffiths Method

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"Concentric" Potentiometer

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"Dwarf" Galvanometer

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High-Grade Resistance Boxes with "Dual" Sliding Contacts

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High Resistance Boxes for Insulation Testing

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Non-Inductive Resistence Boxes

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Portable Potentiometer

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Sensitive Galvanometers

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Signalling and Balancing Condensers for Submarine and Duplex Telegraphy

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Sliding Contact Standard Wheatstone Bridges

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Standard Wheatstone Bridges: Plug Pattern

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The Collection of Historical Scientific Instruments
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