A memorandum dated June 14, 1918, written in French, reveals the formula the Germans used to produce invisible ink.
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- The 1890 U.S. census classified people of African descent as black, mulatto, quadroon, or octoroon, defining "octoroon" as anyone with one-eighth or any trace of black blood, and counted 6,337,980 blacks, 956,989 mulattoes, 105,135 quadroons, and 69,936 octoroons.
- Dottie Ferguson Key of the Rockford Peaches stole 461 bases in 950 games while playing in the All-American Girls Professional Baseball League from 1945 through 1954.
- Ovis longipes palaeoaegyptiacus was one of the two most commonly domesticated sheep depicted on the reliefs of early pharaonic tombs.
- Salomon Brothers' August 1991 admission of improprieties in government securities trading led shortly afterward to the resignation of the firm's senior management.
- Early astronomical records from the Babylonians date back to around 1000 BC.
- Charles Lang Freer left school at age 14 to work in a cement factory before becoming a railroad clerk.