The eye is misled by the effect which the lines drawn outward and inward at their ends produce upon the mind and sight.
ELASTIC QUARTERS
5.
In room marked A two men were placed,
A third he lodged in B;
The fourth to C was next assigned,
The fifth was sent to D.
In E the sixth was tucked away,
F held the seventh man;
For eighth and ninth were G and H,
Then back to A he ran.
Thence taking one, the tenth and last,
He lodged him safe in I;
Thus in nine rooms ten men found place,
Now can you tell me why?
EXCLUDED DAYS
6. Are there any particular days of the week with which no new century can begin?
No. VII.—ILLUSION OF HEIGHT
These straight lines, at right angles to each other, are, though they do not seem to be, exactly equal in length.