Clocks are timekeeping devices everyone is familiar with, and itis easy to take their ability to show their users the exact timedown to the second. However, at one time, clocks weren’t nearly assophisticated, and didn’t even use the same principles as today’stimepieces.The sundial was one of the first clocks that was used by manypeople. By looking at the shadow cast by a sundial’s “styleâ€�– a rod or straightedge that projects from the surface ofthe sundial. To work properly, the style has to be pointed towardstrue North, and the angle it has compared to the horizontal surfacemust be adjusted for the latitude of its location. The biggesthitch is that the Earth doesn’t rotate at a perfectly constantspeed. This can throw off sundial time by as much as 15 minutes.Also, sundials show t