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 10 · from the scan, no model involved

PANELFOAM" •
INSULATION bck p>l|BHlMl pactafa mNMN • • l I pa—» a nM •n po«-CMl Mi aiiraclivtty aacfcag— »•* caataawf caa ca UklMiia) 4
39.0%