posted on Jul, 8 2013 @ 09:20 PM
Would like to point this out:
If you look at the 1861 Almanac table, you'll see that the difference between sunrise on the 1st of Feb to the 8th of Feb is 8 minutes.
Now use the the US Naval Ob link you provided and look at Feb 1st this year and then the 8th. You'll see the difference is: still 8 minutes.
Also: at the US Naval Ob site, look at the times listed for 1861. You'll find that they match up with 2013, but not the book published by hand in
1861 (and which, as mentioned, time measured has changed, and where you are in the time zone).
For example, using the US Naval Ob site, if I punch in Boston, Mass. I get the time for sunrise for 1 Feb, 2013 at 0658 or 6:58 am, however, if I
punch in Springfield, Mass, which is in the same time zone, but located further west from Boston, I get 0703 or 7:03 am.....and if I punch in Chatham,
Mass, which is further east of Boston, I get 0652 or 6:50 am.
Last: go back and look at the old Almanac that was published in 1861 and scroll up to the cover. Note where it says this on it:
"Fitted for Boston, but will answer for all the New England states."
An almanac that was fitted for Boston, but answers for all the New England states. Was the chart specifically for Boston only? Or was it average times
for sunrise and sunset across "all the New England states"?