Block · one region of the page, as the scanner read it. It may hold a whole story, part of one, several, or an advertisement; stitching blocks into articles is the next step. Text is supplied OCR.
Page 21 · column 1 of 6 · from the scan, no model involved
sf^Steel City*MMMBi j PVC SWITCH BOX #1810 18 cu. in. capacity Outlet Box *4" Dia. (#14). . 29* 99*
77.6%