The new CA is a modification of Fredkin's earlier SALT architecture in which every cell is identified as either even or odd - as in sodium and chlorine in a salt crystal hence the name. The state of each cell is either up or down and the development rule simple takes account of states of odd and even neighbours. The up-date at each time step simply takes the form of a swap of the states of diagonally related cells. SALT CAs are reversible and capable of universal computation and are conjectured to be capable of universal construction in the sense of Von Neumann.

It is well enough known that species of the lower forms of plant life, such as ferns and mosses amid the vicissities of change of situation, have spread over both hemispheres without such a departure from the central type as would constitute a distinct species; but is this true as regards higher forms, such as cycads and conifers?

By the bye a droll accident happened here on Thursday, Wadd and Plumley got quarrelling about a kneebuckle of Hyde's which the latter affirmed not to be standard; Wadd was nettled at this, and said something reflecting on tradesmen and shopkeepers, and Plumley struck him.

Then without a word she lay on her back in the bed, her dark blond pubic hair rising about her dark wet cave like dried brush about a hidden spring.