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 3 of 7 · from the scan, no model involved

DWUPUC Drainage Pipe Schedule 40 1 1/2'x 10'
*2.29
82.9%