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File:Pocket box circle Galbraith.png

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Pocket_box_circle_Galbraith.png (349 × 278 pixels, file size: 7 KB, MIME type: image/png)

Description
English: "Pocket box-circle" navigational instrument, invented by mathematician William Galbraith. From Arcana of Science (1838).
Date
Source Google Books
Author Unknown authorUnknown author
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Date/TimeThumbnailDimensionsUserComment
current13:33, 4 May 2012Thumbnail for version as of 13:33, 4 May 2012349 × 278 (7 KB)Charles Matthews{{Information |Description ={{en|1="Pocket box-circle" navigational instrument, invented by mathematician William Galbraith. From ''Arcana of Science'' (1838).}} |Source =[http://books.google.co.uk/books?id=mLAWAQAAIAAJ&pg=PA60&img=1&zoom=3&...

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