Below the oxidized outcrop the vein is often increased in value by secondary enrichment, sometimes to a depth of several hundred feet.
The finer particles of clay in the line of the joint are washed away, while the sandy particles, which nearly all natural clays contain, remain behind and form a constantly deepening porous vein of sand crossing the base of the puddle.
Disintegrating auriferous gravels by powerful jets of water, and the sluice system described above; in the second case the vein stuff is prepared by crushing and the amalgamation is carried out in mills.
If the portal vein is followed from the transverse fissure, it will be seen to branch and rebranch until minute twigs called interlobular veins (fig.
Although our means of forming a fair estimate of Naevius are scanty, all that we do know of him leads to the conclusion that he was far from being the least among the makers of Roman literature, and that with the loss of his writings there was lost a vein of national feeling and genius which rarely reappears.
He came strongly under the influence of the pietists, particularly of Spener, and there was a mystic vein in his thought; but other elements of his nature were too powerful to allow him to attach himself wholly to that party.
Talk in this Ossian-like vein showed that Napoleon's brain no longer worked clearly: it was a victim to his egotism and passion.
While the Eudemian Ethics in a more theological vein emphasizes God, the object of wisdom as the end for which prudence gives its orders, the Nicomachean Ethics in a more humanizing spirit emphasizes wisdom itself, the speculative activity, as that end, and afterwards as the highest happiness, because activity of the divine power of intellect, because an imitation of the activity of God, because most dear to God.
On the other hand reflection on past events made clear to him not only the sufferings but the defects and follies of the national heroes, and from henceforth, for the first time, we notice a bitterly humorous vein in his writings.
A vein of sadness runs through his poems, sometimes breakirg out into querulous exclamation, but more frequently ventirg itself in gloomy reflections and prognostications.