This Day in Geek History: December 6
1631
The transit of Venus occurs as predicted by Johannes Kepler. He correctly predicted that an ascending node transit of Venus would occur in December 1631, but it passed unobserved in part because his prediction wasn’t sufficiently accurate to predict the exact time it would occur and in part because it occurred after sunset for most of Europe. Unfortunately, Kepler died a year before the event.
1768
The first edition of the Encyclopædia Britannica (Latin for “British Encyclopaedia”) is published under the title “Encyclopedia Britannica, or, A dictionary of arts and sciences, compiled upon a new plan.” The series will eventually become the oldest continuously published English-language encyclopedia. The first edition is published in one hundred installments, which will later be bound into three volumes. Each installment costs sixpence or eight pence for an edition printed on finer paper and is delivered in weekly installments. It will also be published under the pseudonym “A Society of Gentlemen in Scotland,” a title which refers to the many gentlemen who had purchased subscriptions. The three bound volumes will be sold for twelve pounds sterling apiece. The set runs 2,391 pages and includes 160 copperplate illustrations. However, one set of illustrations, a three page depiction of female pelvises and fetuses in the midwifery article will be torn from every copy by order of King George III.
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