The metals may be arranged in a series according to their power of displacing one another in salt solutions, thus Cs, Rb, K, Na, Mg, Al, Mn, Zn, Cd, Tl, Fe, Co, Ni, Sn, Pb, (H), Sb, Bi, As, Cu, Hg, Ag, Pd, Pt, Au.
The cells of tl ommatidium are a good deal larger than the neighbouring common cells of the epidermis.
A contemporary t ccount of this event has been preserved in two letters of the tl ounger Pliny to the historian Tacitus.
The words introducing this form (6Tav bE TO '&TL Tptrov irpoo-KaTnyopijTac, chap. so, s 9 b s 9), which are the origin of the phrase tertii adjacentis, disengage the verb of being (g un) partially but not entirely, because they still treat it as an extra part of the predicate, and not as a distinct copula.
Things are substances (oioiam), each of which is separate individual (Xcopu rTOv, TO& TL, Kae' 'KaQTov) and is variously affected as quantified, qualified, related, active, passive and so forth, in categories of things which are attributes (ovy13€07paiTa), different from the category of substance, but real only as predicates belonging to some substance, and are in fact only the substance itself affected (avr6 it€irovObs).
