Page:Philosophical Transactions - Volume 095.djvu/150

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136
Mr. Pigott's Investigation of the Changes

Table V.

Decrease from the Middle of its full
Brightness to the Middle of its
least.

See Table I.

Increase from the Middle of its least
Brightness to the Middle of its
full.

See Table I.

1796. September 17 35 days 1796 September 3 14 days
October 22 September 17
1797. May 14: 57 October 22 22
July 10 November 13
August 7 39 1797. July 10 28
September 15 August 7
October 15 22 September 15 30
November 6 October 15
1798. July 29 48 1798. July 10 19
September 15 July 29
October 25 16 September 15 40
November 10 October 25
1799 August 7 40 1799 July 4 34
September 16 August 7
October 11 25 September 16 25
November 5 October 11
1801 July 14 38 1801 August 21 34
August 21 September 24
September 24 22 ——
October 16 27+ on a
mean.
——
34 on a mean.

The sum of these two means (61+), agreeing so satisfactorily with the whole rotation (611/2), no correction is requisite, as was the case with the former determinations of 1796 to reduce them to 28 and 35 days, results that differ considerably from the above (34 and 27+); but as they were deduced from only two intervals, the disagreement cannot be of any consequence, provided the number of each set be proportionally