11. The equation of time values for each day of the year, compiled by astronomical ephemerides. 12. Another disadvantage of variable pendulum clocks is that the equation of time cannot be easily displayed. 13. See also equation of time . talk ) 07 : 29, 18 April 2010 ( UTC) 14. The user has to add the equation of time to clock time to calculate solar time. 15. This corresponds with the sign of the equation of time , which is positive in the westward direction. 16. The Equation of Time was not used. 17. Solar noon is always close to 12 : 00, again differing according to the equation of time . 18. Both solar and mean times can be easily and clearly displayed, as can the equation of time . 19. This mean time sundial automatically corrects for the equation of time through the use of an analemma-inspired gnomon. 20. The hour display is not adjusted for the equation of time , so the hour reading is slightly approximate.
