MATHEMATICS.

To find the days when eclipses happen.

It is required to find the number of eclipses

in the year 1806; and on what Days they happen.

The mean Long. of )’s north Ω in 1806 is 9^{S}=7˚=14’=28”

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Add 6^{S} gives Moon’s south node 3=7=14=28

May be one in January, when ּ Long. is &nSsp; 9^{S}=11˚=21’

May be one in June, when ּ Long. is 3=7=46

May be one in Dec. when ּ Long. is 9=7=2

[Node Months]

January.

June.

December.

It is required to find the number of eclipses

in the year 1811.

The Moon’s north node in 1811 is 6^{S}=0˚=32’=42”

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The Moon’s south node 0=0=32=42

One eclipse in March ּ Long. is about 32’=42”

May be another in March ּ Long. being about 32’=42”