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Title: Forsyth's Improved Railway Signals. [Go to resource]
Description: Coloured lithograph. Forsyth's Improved Railway Signals. Series of seven drawings showing the use of Forsyth's Improved Railway Signals together with a diagram showing the comparative value of coloured lights for signalling. Printed by Bradshaw and Blacklock. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: Coloured lithograph Source: Science Museum Identifier: http://collectionsonline.nmsi.ac.uk/grab... Go to resource More Like this...
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