Word clock

The 28th General Conference on Weights and Measures is expected to settle the debate over whether we should be so pedantic about our measures of time, putting the future of the "leap second" to a vote.

The Word Clock consists of two adjacent rolls, one with five minute time increments written out and the other with the words one to twelve, that turn against each other within an acrylic tube to produce whole sentences like “a quarter to six”.