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 24 · column 2 of 4 · from the scan, no model involved

WINDOWS
EXCEL CLAD CASEMENT WINDOWS
•White •Vinyl-clad sash •Aluminum clad exterior/Wood interior •3/4" insulated glass _
79.0%