Gutenberg Gem: The Encyclopædia Britannica,Volume IV – Part 04 of 04

Well, Project Gutenberg has another installation in their Encyclopaedia Britannica digitization effort. This one includes a number of cool (well, I think they are cool subjects) including Calculating Machines and Calendars. There are also nice maps of Bulgaria, Burma and Cairo. Check ’em out.

The Encyclopædia Britannica,Volume IV – Part 04 of 04

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Slide Rule Illustration from Encyclopedia Britannica