Post by Pat Ballew

1825 Benjamin Gompartz leter to Francis Baily in which he expounded his law of human mortality. Today the curve is expressed as \( N(t) = N(O) e^{-c(e^{at}-1)} \) *Philosophical Transactions of the Royal Society of London (For those interested in mathematical notation, this paper makes frequent use of the overbar as a vincula or grouping symbol in plaxe of modern day parentheses.