John Hall wrote:
In article .com,
Weatherlawyer writes:
I shall have to do these years:
Snow began to fall in January and then "it froze most days & every
night till February 16 ... February 2 when the Ice was thickest I found
it 11.5 In. thick in a pond ... The Effects of this frost were many &
destructive...".

If you do then bear in mind that, the year bring prior to 1752, the
dates will be Old Style and you'll need to add about 11 days to convert
to New Style.

It will be nice to get back in the swing of things. Or how can I tell
it wasn't a negative NAO?

Anything on the database for hurricanes that year? Or large mag
earthquakes?

I suppose that the Admiralty might have records of hurricanes that
affected RN ships. I believe it was standard practice for naval vessels
to include weather info in their logs.

Any idea how that would affect this:
http://sunearth.gsfc.nasa.gov/eclips.../phasecat.html

I'm going to presume that the dates are converted to the standard that
all the others are based on: The Julian Calendar that modern astronomy
programmes work on. And that they have been worked backwards to allow
for that deviation as I hope had the OP's quote.

But the general run of the phases would give a yearly standard that
would stand out from the attempt to capture the spell of individual
phases anyway. The only point required would be to find out if the NAO
was +ve or -ve.

I'm too tired to bother ATM though.