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££,,,£,,££ £,,£,,,£,,
£,£,,££,£, ££,££,,££,
££££,£,£££ trains are so constructed that they £,££,£,£,£
,,,,££££,, have to follow a set path. this path is £££,££££££
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££,,££,,££ of two metal rails, hence its nickname. ££,£,£,,,,
£,£,£,£,£, ,,£££££,,,
££££££££££ because the low friction between the £,£,,,,£,,
£,,,,,,,,, wheels of the train and the rail metal, ££££,,,££,
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£,££,,,,,, the ground under the rails can be ,£,,£,££,,
£££,£,,,,, sloped. thus a railway is often not led ,££,£££,£,
£,,£££,,,, on top of hills, rather through them in ,£,££,,£££
,£,£,,£,,, tunnels (if they are large), or ,£££,£,£,,
,££££,££,, artificial chasms. ££,,£££££,
,£,,,££,£, £,£,£,,,,£
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,,,£,£££,, rails, but not too close, or they will ,£,,,,£,,£
£,,£££,,£, be cut down by the railway janitors. £££,,,££,£
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£££££,£££, water. ,£,££,£££,
£,,,,££,,£ ,£££,££,,£
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£££,,£££££ the way, there is information £££,£,££££
,,,£,£,,,, scattered, often put on top of poles, ,,,££££,,,
,,,££££,,, to be interpreted by the train drivers. ,,,£,,,£,,
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,,,££,,££, different speed limits. ££,£,£,£,£
£,,£,£,£,£ £,££££££££
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,££,££,,,, ££££,£,,,,
,£,££,£,,, ££££££££ £,,,£££,,,
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,££,£,£,££ often this proves to be the shorter ,££££,££,£
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