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 11 · column 3 of 4 · from the scan, no model involved

Protein Blocks - regular $3.90 MO blocks - $3.75 11 or more ~ f >.60 Mol-Mitg 1 I cks - regular $S
1-10 blocks - 8500 \ i 1 isr more - '? 1.80 ' O.-* ~ regular SIS, « . .■Mv*.1 ?12.8'3
39.9%