Acceder

[…] lawful covenants, made by the greater part of a society bind the whole, and every future acceder to it,—at least, unless the minority o[f] acceders have, by a proper dissent, diverted the obligation from themselves […]

He mentions this, not, of course, for readers in general, but for the sake of those daily acceders to the list of the reading public, whose knowledge of books is not yet equal to their love of them.