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following a solar eclipse is usually a lunar eclipse. Also if one pair of eclipses occurs in February, look for the other pair in August.

Bearing the above in mind, eclipses in any year may be found with fair success by the following simple rule:

(1.) From the year for which eclipses are wanted, subtract 18. The resulting year we will call the ‘Eclipse Year.’

(2.) Search the ‘Eclipse Year’ for New and Full Moons which are eclipses. Note their dates only.

(3.) In the year previous to the ‘Eclipse Year,’ note the dates and zodiacal places of the lunations which occur about eleven days after the dates obtained in the ‘Eclipse Year.’ These are the dates and places of eclipses in the year wanted.

In order to test the simple rules of thumb here given, let us imagine this is the year 1910, and that we want to find the first solar eclipse occurring in 1915. We take an ephemeris for 1897 which is eighteen years earlier than 1915, and look for the first solar eclipse.

We find a solar eclipse on the 1st of February 1897.

To ascertain the date and degree of the Zodiac in which this eclipse will fall in 1915, we look for in-