Usage examples (6)

• The eye itself is not conscious of this 'break' in the light-rays, because it is accustomed to 'project' all light impressions rectilinearly out into space (Fig. 12b.).
• With respect to the Galileian reference-body K, such a ray of light is transmitted rectilinearly with the velocity c.
• Though rather less than ten inches in length by about three inches in breadth, it exhibits no fewer than seven of those round, beautifully sculptured scars, ranged...
• The true must be essentially the self-reflecting self-contained recurrent, that which secures itself by including its own other and negating it; that makes a spherical system...