Image:Variable scale-gerber hg.jpg

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Description

Variable scale (after H. Joseph Gerber) ®. Expandable ruler used to scale individual distances between points e.g. in maps

Source

own work

Date

2006-08-08

Author

Hannes Grobe 19:10, 3 September 2006 (UTC)

Permission

Own work (Creative Commons)

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Metadata

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