8:14 PM
Apparently Gauss used it in 1818 when surveying Hanover, but there's no reference for it yet: chat.stackexchange.com/transcript/message/55406053#55406053
Apparently Bernoulli would have used special cases of it in his 1700s book Ars conjectandi but again no reference to a page number or anything: chat.stackexchange.com/transcript/message/55406032#55406032
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