The point of the wedge is quite indefinite, the extremely diffuse light gradually fading into invisibility at a height which may range from 50° to 70° or even more, according to the keenness of the observer's vision.
Michaelis says, it renders the race type with astounding keenness, and shows an excellent power of observation in the exact representation of the eyes.
Nowhere, however, were the keenness and clearness of his intellect more conspicuous than in this brilliant effort, which, if it failed in its immediate object, was highly effective in secondary results.
While in public life Conkling always attracted attention by his abilities, his keenness and eloquence in debate, his aggressive leadership and his striking personality.
But Lynceus, whose keenness of sight was proverbial, saw Castor through the trunk and warned his brother, who thereupon slew the mortal Castor; finally, Pollux slew Lynceus, and Idas was struck by lightning (Apollodorus iii.