"The Latins called accounts of money rationes, and accounting ratiocinatio; and that which we in bills or books of account call items, they call nomina, that is names; and thence it seems to proceed, that they extended the word ratio to the faculty of reckoning in all other things."
— Hobbes, Thomas (1588-1679)
(I.iv, p. 20; compare pp. 15-16 in ECCO-TCP ed.)
Text from Past Masters, drawn from the 1843 Molesworth edition.
See also Leviathan, or, The Matter, Forme, and Power of a Common Wealth, Ecclesiasticall and Civil by Thomas Hobbes (London: Printed for Andrew Crooke, 1651). <Link to EEBO-TCP>
Reading Thomas Hobbes, Leviathan, ed. Edwin Curley (Indianapolis and Cambridge: Hackett Publishing, 1994).