VOLUME

   Let a tumber, (A), be half full of water, and a second tumbler, (B), be half full of wine. A teaspoon of of wine is poured from (B) into (A), and then a teaspoon of the mixed water and wine is taken out of (A) and is put into (B). The question is: after all this, has the tumbler, (B), lost more wine than the water, which has been lost by the tumbler (A)?
   Most people will say at once that more wine was lost by (B), than the water lost by (A); the correct answer is that they come out even, one losing less than a teaspoon ful of wine, the other the same quantity of water; each loses the same fraction of a spoonful.