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Eclipse, 17 July
1748
Notes relevant to the map of the eclipse (none directly
from Cumbria).
... ...
Mr URBAN,
I Had the pleasure and satisfaction of making some
observations of the great solar eclipse, on the 14th
instant, at Grantham, in Lincolnshire, by a
good pendulum clock rectify'd to the apparent time, and the
application of a smoak'd glass to the focus of a telescope
of 10 feet in length. I perceiv'd the moon's first
impression on the sun's limb, or the beginning of the
eclipse, at 1 m. past 9; soon after, the sky being tolerably
clear, I darken'd a room fit for observation, into which I
let in, through my telescope, the image of the sun, which I
received upon a pastboard made of white paper, having a
proper number of white circles projected on it. By this
means, I observed very carefully several beautiful phases or
appearances, that the moon's shadow made upon the sun's
image, and particularly that most remarkable one at the time
of the nearest appropinquation of their centers, or middle
of the eclipse, which happened at 31 m. past 10. The
duodecimal parts, or digits eclipsed, I measured 10°
4'; the exact time of the end I could not observe, the sun
being quite clouded; but by comparing several phases of the
shadow decreasing with the intervals of time between them I
imagine it might happen about 6 m. past 12. If you please to
give this a place in your Magazine, you will very much
oblige your most humble servant,
Grantham, July 22, 1748. RO. WHITE.
Mr URBAN,
Luffwick, near Thrapston, in
Northamptonshire.
THE sun's eclipse was accurately observ'd here as follows;
which if you please to insert, it may oblige your
astronomical readers.
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