394

LUNAR ELEMENTS.

Synodical revolution in days

Sidereal

do.

do.

Tropical

do.

do.

Anomalistic

do.

do.

Nodical

do.

do.

Maximum evection

Maximum variation . .

Maximum annual equation

Maximum libration in latitude .

Ditto do. in longitudeMaximum total libration (from earth’s centre)

Maximum diurnal libration .

Surface of moon never seen (whole as 10,000,

and diurnal libration neglected) .

Surface seen at one time or other do. do.

Ditto do. never seen if diurnal libra-

tion be taken into account ...

Ditto do. seen at one time or other do.

Mean revolution of nodes (retrograde) in daysDitto do. do. in years

Mean regression of nodes per annumMean regression of node between successive con-junctions of sun and rising node .

Mean interval between such conjunctions in daysMean revolution of perigee (advancing) in days ...

Ditto do. in years .

Mean advance of perigee per annum .

Ditto do. between successive con-junctions of sun and perigee .

Mean interval between such conjunctions in days

29-5305927-3216627-3215627-5546027-212221 ° 20 ' 29"-935 ' 42"-0ll'12"-06 ° 44 '7 ° 45 '10 ° 16 '1 ° 1 ' 28"-8

4198

5802

411158896793-39118-599719 ° 21 ' 18"’3

18 ° 22 ' 3"-2346-6073232-5758-850540 ° 40 ' 31"-1

45 ° 51 ' 23"-7411-767

WYMAN AND SONS, PKINTBBS, GBBAT QUBBN STBEBT, LONDON .