Lightbox / Drawing Table.
Actually, it's more than a lightbox; it's also a portable drawing table in that it has a tilting top, built-in measuring rules along three edges and a 24 inch T-square.
Two 15 w. fluorescent fixtures, plus two 40 w. showcase lamps, provide even lighting over the entire frosted-glass top.
Also great for reviewing photographic slides and negatives.
Four pages ( 2 sheets - front and back on both sheets ) B & W photos, illustrations, expanded view and instructional narrative.
My plans are from original source materials such as books, magazines and other publications and the pages are carefully removed.