Hello John, thankyou for your question.
There could be up to four lights put on the front of an engine which were arranged in a pattern which told a signalman what the train was carrying. Things like bananas and vegetables would go bad if held up so they were called express goods. The royal train had all four lights on.
Answer researched by Abbie, Junior Curator
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This lever is swinging like a pendulum and it is occilating motion
The wheels are moving in a circular motion
The backwards and forwards movement of the piston is called reciprocating motion
The only motion I can't show you is linear motion because the picture would drive off the page
Answer researched by Joe, Junior Curator