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 18 · column 4 of 6 · from the scan, no model involved

The energy taken up by iaily evaporation of water from the seas corresponds to 100,000 times the total electric generating capacity of the United States in 1970, National Geographic says.
90.4%