With increased use they become more and more permeable, and thus learning is the process of making easier the passage of the nervous current from one neurone to another.

An abundance of nervous energy is very advantageous, for, as has been intimated in a former chapter, nervous energy is diffused and spread over all the pathways that are easily permeable to its distribution.

Adj. open; perforated &c v.; perforate; wide open, ajar, unclosed, unstopped; oscitant^, gaping, yawning; patent. tubular, cannular^, fistulous; pervious, permeable; foraminous^; vesicular, vasicular^; porous, follicular, cribriform^, honeycombed, infundibular^, riddled; tubulous^, tubulated^; piped, tubate^. opening &c v.; aperient^. Int. open sesame!, 261.

In the midst of this permeable pitch stood a colossal mass of gold, in shape like an altar, and girdled about by a huge serpent, gorgeous and terrible; his body flecked with diamonds, and his head, an enormous carbuncle, floating like a meteor on the air above.

In place of the air now comes, so it was reasoned formerly, the ether which fills the spaces of the universe and is the carrier of light and of electro-magnetic phenomena; there were good reasons to assume that the earth was entirely permeable for the ether and could travel through it without setting it in motion.

Water was admitted to the Cheurfas reservoir in January, 1885, and it at once began to make its way through permeable ground at one end of the dam.

There is no such thing as solid substance, matter is permeable to these forces, and, therefore, it is easy to see how a terrapin can come quick as lightning through a wall."

It is usually much more permeable to air, even in green wood, notably so in loblolly pine and even in white oak.

These foundation rocks are, especially in the northern and more modern parts of the city toward the coast of the sea and not of the harbor, Quarternary, and especially Tertiary, formations, so permeable that liquids emptied into excavations are absorbed and disappear.

In other parts of the city the rocks are not permeable, and pools are formed.

The only way of really nursing a real patient is to have an iron bedstead, with rheocline springs, which are permeable by the air up to the very mattress (no vallance, of course), the mattress to be a thin hair one; the bed to be not above 3-1/2 feet wide.