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 5 · column 5 of 6 · from the scan, no model involved

UNIVERSAL EQUIPMENT OPERATORS SCHOOL, INC. 500 Walker Building Washington, D. C. Name_AgeStreet_*- Street_*City _State_ Phone_Hrs. at Home_
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