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 7 · column 2 of 4 · from the scan, no model involved
235-lb. SELF-SEALING ASPHALT
ROOFING SHINGLES By OWENS-CORNING White and Black — 15-Year Guarantee OR 331/3s<l ft.
$18" Per Square
78.0%