This, which might well seem impossible, is done by placing, as a foundation, dominoes in the positions indicated by dotted lines. The arch is then carefully constructed, as shown in the diagram, and for the finish the four stones between the two foundation arches are drawn out, and placed in pairs on end above, and finally, with the utmost care, the other four are drawn away, and built in on the top. Thus the stones indicated by the dotted lines at the base take their place within the dotted lines above.
No. XLI.—FAST AND LOOSE
This diagram represents a shallow box, on the bottom of which twelve counters or draughtsmen are lying loose.
How can they be readjusted so that they will wedge themselves together, and against the side of the box, and it can be turned upside down without displacing them?
34
Taken entire
I’m full of fire.
With head away
A tax I pay.
If tail you bar
I turn from tar.
Headless again,
With tail restored.
Goddess of pain,
I sow discord.