Note 609 — Chapter XXV

Oughtred, in his Clavis Mathematica, published in 1631, abbreviated the rules of Vieta, though he still used capital letters. He also gives succinctly the praxis of algebra, or the elementary rules we find in our common books, which, though what are now first learned, were, from the singular course of algebraical history, discovered late. They are, however, given also by Harriott. Wallisii Algebra.