1. Large wooden desks with brass fittings.
2. Telegraph instruments with brass keys and dials.
3. Message forms and message books.
4. Letter copying presses.
5. Maps and charts.
6. Clocks and calendars.
7. Telegraph poles and wires.
8. Gas lamps or candles for lighting.
9. Bell signals to alert operators.
10. High ceilings and tall windows to allow for ventilation and natural light.
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