I see in the October 1793 that the Sun Fast column reflects the Equation of Time: it goes from +11 minutes on October 1 to +16 minutes on October 31. But the August 2017 Sun Fast is not the equation of time - it goes from +9 minutes on August 1 to +16 minutes on August 31. According to the Equation of time, that +9 on August 1 should be -6 minutes, and the +16 on August 31 should be 0 minutes.
Why is Sun Fast not the Equation of Time? Is there some additional factor I need to subtract from the OFA's Sun Fast to get the Equation of Time? It looks like Sun Fast is ahead by 16 minutes.
I see in the October 1793 that the Sun Fast column reflects the Equation of Time: it goes from +11 minutes on October 1 to +16 minutes on October 31. But the August 2017 Sun Fast is not the equation of time - it goes from +9 minutes on August 1 to +16 minutes on August 31. According to the Equation of time, that +9 on August 1 should be -6 minutes, and the +16 on August 31 should be 0 minutes.
Why is Sun Fast not the Equation of Time? Is there some additional factor I need to subtract from the OFA's Sun Fast to get the Equation of Time? It looks like Sun Fast is ahead by 16 minutes.