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The Pamphlet Collection of Sir Robert Stout: Volume 84
Telephone Exchange
Telephone Exchange.
| Cost of Construction | £37,319 |
| Annual cost of Maintenance | £8,985 |
| Annual Revenue, exclusive of Government connections | £14,404 |
| Number of Subscribers | 1,765 |
| Cost of each connection | £20 8s. 6d. |