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le-4 1.0 T T T 6 'y | — _ slavery 3 iS) c oO DS O05- 4 o 129 million books . =m a a> i published _ | 0.0 \ 1 1 1800 1850 1900 1950 2000 Year 12 million BOOKS van, ee News Cc ars r scanned m3 1884 1943 — the Great War ss — World War | 1S) — _ World War II c oO 3 log 5 million books 2 analyzed Frequency of the rae word "apple" (0) 1800 1850 1914 1939 2000 Year Year
HOUSE_OVERSIGHT_017003