Of, 40; self-starting, 42. Interlocking of signals, 204, 222. Internal-combustion engine, 87. Iris.
£1,637,000 £8,555,000 Post offices 209 21,551 Post roads (miles) 5,642 178,670 Revenue of Post-office £22,800 £1,207,000 Expenses of Post-office £22,800 £1,207,000 Expenses of Post-office £22,800 £1,207,000 Expenses of Post-office £22,800 £1,207,000 Expenses of Post-office £22,800 £1,207,000 Expenses of Post-office £15,650 £1,130,000 Mileage of trains 4,560 Total length of railways.