**Synodic** Period >>

As the /see' is longer than a **synodic** revolution of the moon, the sun cannot arrive twice at a chung-ki during the same lunation; and as there are only twelve tsee, the year can contain only twelve months having different names.

Long before the exact length of the year was determined, it must have been perceived that the **synodic** revolution.

The month, however, being a convenient period of time, has retained its place in the calendars of all nations; but, instead of denoting a **synodic** revolution of the moon, it is usually employed to denote an arbitrary number of days approaching to the twelfth part of a solar year.

The Months Now Consisted Of Twenty Nine And Thirty Days Alternately, To Correspond With The **Synodic** Revolution Of The Moon, So That The Year Contained 354 Days; But A Day Was Added To Make The Number Odd, Which Was Considered More Fortunate, And The Year Therefore Consisted Of 355 Days.

Thus The Corresponding Relative Mean Geocentric Motion Of The Moon From The Sun Is 12 X360 { 477616" 724; And The Duration Of The Mean **Synodic** Revolution Of The Moon, Or Lunar Month, Is Therefore 1236776072 25 = 29'530588 Days, Or 29 Days, 12 Hours, 44 Min.

On The Other Hand, The Exact Time Of A **Synodic** Revolution Of The Moon Is 29'530588 Days; 235 Lunations, Therefore, Contain 2 35 X 29 530588 = 6 939'6 8818 Days, Or 6 939 Days 16 Hours 31 Minutes, So That The Period Exceeds 235 Lunations By Only Seven And A Half Hours.

W.) was brought into closer relations with the colonial churches than Tait was; but the healthy development of the Lambeth Conferences on the lines of mutual counsel rather than of a hasty quasi-**synodic** action was largely due to him.

**SYNODIC** PERIOD, in astronomy, the apparent period of a planet or satellite when its revolution is referred to the line passing through the earth or the sun.