Its getting a bit historical...
An old ukulele plan from The Industrial Arts Magazine, December 1915... (yes, 1915!)
Searching something else on my PC I found the link to this PDF, which obviously is part of the nalu-music.com website.
But I can't find again the page where the PDF was linked from.

Edit: found it: here!
The best thing is (as John King from Nalu Music mentions in the PDF) that this old copy of the magazine obviously only survived because there was an ukulele plan inside!