ROBIKTSON HISTORICAL CANADIANA - Toronto Public Library

12
ECLIPSES OF THE SUN AND l\lOON, 1837.
APRIL 5.-The Sun will be eclipsed at half-past 2 in tbe morning-in.
visible.
APRIL 20.-The Mooll will be eclipsed at 45 minutes past 3 o'clock in
afternoon-invisible.
MAY ,i.-The Sun will be eclipsed at ~ o'clo!'k in the aft~rnoon-invisible.
OCTOBEI~ 13.-The Moon will be eclIpsed In the evenmg, total & partly
visible, as follows:-
Moon rises at .............. 20 minutes past 5 in tbe evening.
Beginning of total darkness, .. 35 " ',: 5 do.
Ecliptical opposition, •..•... 22 6 do!
Middle, ................... 27 6 do.
End of total darkness,. . ..... 9 7 do.
End of the Eclipse,.. . , .... 5 " ., 8 do.
Dnration of visibility, 2 hours and 49 minutes.
Quantity at rising, Si digits.
Depth of immersion ill the Earth'. shadow, 10 digits from the Southern
siue.
OCT0"E.l~ 29.-8uo eclipsed at 45 minutes past 6 in tbe morning -invisible.
nrOON's RISING
At four days' old it sets at, and
shines till, ahout ten at night.
5 - - about - - 11
6 - - about - - 12
7 at nrar one in the morning.
15, at fllll, it rises about 6 in the
AND SETTING.
16 - at J after -
17 - at J after -
18 about
19 about
20 ahout
7
S
10
11
12
evcnin h .
..•.. '- .. ,.J.
N. B.-This table is sufficiently accurate for tbe'parl"ose for which it
is wanted-that of ascertuining moonlight Cyenlllg,..,; ".:;
.• :--'! :J,,!"l"•. ~
OF THE CHANGES OF THE'i:l100N.
Many persons, understandin/!: that tbe menu time hetween one new
Moon and another is 29 days, 12 bour., 44 minutes and a fraction, ima·
gine that, to find the full or quartCl"s of the ]\Ioon, they have only to add
Il half or fourth part of that time; and when they do not find the changes
marl{.d in the Calendar to correspond with tbjs method, they impute it
to mistake in the calculation of tbose changes. It is therefore necessary
to put them in mind, that the great inequality of the Moon's motions
I'enders the above rule extremely inaccurate, so that nineteen times in
twenty it must fail in giving the true conjunction or change.
THE FOUR QUARTERS.
Spring Quarter begin. March 20, at III 14m morning.
Summer Quarter begins June 22, at 4h 38m morning,
Autumn Quarter begins Sept. 23, at 5h 7m afternoon.
Wintel' Quarter begins Dec. 22, at 2h 3m afternoo~.