TO TELL TWO CARDS OUT OF TWENTY.
You must retain in your memory the four following words, with the arrangement of the letters which compose them:—
| m | i | s | a | i |
| t | a | t | l | o |
| n | e | m | o | n |
| v | e | s | u | l |
Collect all the cards into the left hand, two by two, as they lay on the table, and then place them, one by one, in the same order as the preceding letters, taking care to place the two first as the two m, the two next as the two i, the two following as the two s, and so on.
Ask each person in which horizontal row his two cards are. If he says they are both in the same row, for example the third, they will be pointed out by the letters n and n, contained in that row; if they are in two different rows, as the first and last, the letters s and s will indicate the place which they occupy.