File:Plate from Nicholson-II.png

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DescriptionPlate from Nicholson-II.png	English: A plate from Peter Nicholson's book The Guide to Railway Masonry, containing a Complete Treatise on the Oblique Arch showing the development of the intrados of a helicoidal skew arch against its plan view
Date	1860
Source	Plate from Peter Nicholson's book The Guide to Railway Masonry, containing a Complete Treatise on the Oblique Arch
Author	Peter Nicholson

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	14:51, 31 August 2009		490 × 654 (58 KB)	MegaPedant (talk \| contribs)	{{Information \|Description={{en\|1=A plate from Peter Nicholson's book ''The Guide to Railway Masonry, containing a Complete Treatise on the Oblique Arch'' showing the development of the intrados of a helicoidal skew arch against its plan view}} \|Source=Pl

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