Informational Site NetworkInformational Site Network
Privacy
 
Home Top Rated Puzzles Most Viewed Puzzles All Puzzle Questions Random Puzzle Question Search


THE PAPER BOX.





(Various Dissection Puzzles)
It may be interesting to introduce here, though it is not strictly a
puzzle, an ingenious method for making a paper box.
Take a square of stout paper and by successive foldings make all the
creases indicated by the dotted lines in the illustration. Then cut away
the eight little triangular pieces that are shaded, and cut through the
paper along the dark lines. The second illustration shows the box half
folded up, and the reader will have no difficulty in effecting its
completion. Before folding up, the reader might cut out the circular
piece indicated in the diagram, for a purpose I will now explain.
This box will be found to serve excellently for the production of vortex
rings. These rings, which were discussed by Von Helmholtz in 1858, are
most interesting, and the box (with the hole cut out) will produce them
to perfection. Fill the box with tobacco smoke by blowing it gently
through the hole. Now, if you hold it horizontally, and softly tap the
side that is opposite to the hole, an immense number of perfect rings
can be produced from one mouthful of smoke. It is best that there should
be no currents of air in the room. People often do not realise that
these rings are formed in the air when no smoke is used. The smoke only
makes them visible. Now, one of these rings, if properly directed on its
course, will travel across the room and put out the flame of a candle,
and this feat is much more striking if you can manage to do it without
the smoke. Of course, with a little practice, the rings may be blown
from the mouth, but the box produces them in much greater perfection,
and no skill whatever is required. Lord Kelvin propounded the theory
that matter may consist of vortex rings in a fluid that fills all space,
and by a development of the hypothesis he was able to explain chemical
combination.
[Illustration:


Read Answer







Previous: THE CARDBOARD CHAIN.



Add to del.icio.us Add to Reddit Add to Digg Add to Del.icio.us Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network
Report
Privacy
SHAREADD TO EBOOK




Random Questions

The Chalked Numbers
THE SQUIRE'S CHRISTMAS PUZZLE PARTY
The Forsaken King.
The Guarded Chessboard
The Coinage Puzzle
THE PROFESSOR'S PUZZLES
Curious Numbers.
Money Puzzles
The Five Tea Tins
MISCELLANEOUS PUZZLES
The Forty-nine Stars.
The Guarded Chessboard
The Sultan's Army.
Money Puzzles
St. George And The Dragon.
The Guarded Chessboard
Boards With An Odd Number Of Squares.
Chessboard Problems
A Shopping Perplexity.
Money Puzzles
Digital Multiplication.
Money Puzzles
A New Match Puzzle.
Patchwork Puzzles
The Spot On The Table.
Money Puzzles
The Fly On The Octahedron.
Unicursal and Route Problems
Catching The Mice.
Moving Counter Problem