Sidereal Time is that measured by the fixed stars, which are at such an immense distance from the earth that the diurnal motion of the earth brings these stars to the meridian at sufficiently regular intervals. It is necessary, however, to remember when making observations for sidereal time that these must be made from fixed or twinkling stars, not from planets.
Of the various Eras from which time has been dated, the following are the chief:—
A.M. Anno Mundi. The Year of the
World, dating from the Creation, according
to Jewish Calendar 5635
The Deluge, Era of, variously
reckoned 2348 to 3155 B.C.
The first Olympiad 776 B.C.
A.U.C. or Anno Urbis Conditæ, the year
of the building of Rome 753 B.C.
The Hegira, or Flight of Mahomet from
Mecca to Medina 622 A.D.
The Birth of Christ in the year of the
World 4004
The Jewish year 5635 commenced Sept.
12, 1874 A.D.
| Day | January | February | March | April | May | June |
|---|---|---|---|---|---|---|
| 1 | 3m.fa.45s. | 13m.fa.50s. | 13m.fa.50s. | 4m.fa. 1s. | 3m. sl. 0s. | 2m. sl.30s. |
| 3 | 4 41 | 14 4 | 12 11 | 3 25 | 3 14 | 2 12 |
| 5 | 5 36 | 14 16 | 11 45 | 2 49 | 3 26 | 1 51 |
| 7 | 6 29 | 14 24 | 11 16 | 2 14 | 3 35 | 1 30 |
| 9 | 7 20 | 14 29 | 10 47 | 1 41 | 3 43 | 1 7 |
| 11 | 8 9 | 14 30 | 10 16 | 1 8 | 3 48 | 0 44 |
| 13 | 8 55 | 14 29 | 9 43 | 0 36 | 3 51 | 0 19 |
| 15 | 9 39 | 14 24 | 9 9 | 0 5 | 3 51 | 0 fa. 6 |
| 17 | 10 20 | 14 16 | 8 35 | 0 sl. 24 | 3 50 | 0 31 |
| 19 | 10 58 | 14 6 | 7 59 | 0 52 | 3 46 | 0 57 |
| 21 | 11 33 | 13 53 | 7 23 | 1 18 | 3 40 | 1 23 |
| 23 | 12 5 | 13 37 | 6 46 | 1 42 | 3 32 | 1 48 |
| 25 | 12 34 | 13 19 | 6 9 | 2 5 | 3 22 | 2 14 |
| 27 | 13 0 | 12 58 | 5 32 | 2 25 | 3 10 | 2 39 |
| 29 | 13 22 | - - - | 4 55 | 2 44 | 2 55 | 3 4 |
| 31 | 13 41 | - - - | 4 19 | - - - | 2 39 | - - - |
| Day | July | August | September | October | November | December |
|---|---|---|---|---|---|---|
| 1 | 3m.fa.28s. | 6m.fa. 5s. | 0m.sl. 3s. | 10m.sl.16s. | 16m.sl.18s. | 10m. sl.52s. |
| 3 | 3 51 | 5 57 | 0 41 | 10 54 | 16 19 | 10 5 |
| 5 | 4 13 | 5 47 | 1 20 | 11 30 | 16 17 | 9 17 |
| 7 | 4 33 | 5 34 | 2 0 | 12 5 | 16 12 | 8 26 |
| 9 | 4 52 | 5 19 | 2 41 | 12 38 | 16 4 | 7 33 |
| 11 | 5 9 | 5 2 | 3 22 | 13 10 | 15 52 | 6 38 |
| 13 | 5 24 | 4 42 | 4 4 | 13 40 | 15 37 | 5 42 |
| 15 | 5 38 | 4 20 | 4 47 | 14 8 | 15 18 | 4 45 |
| 17 | 5 49 | 3 55 | 5 29 | 14 33 | 14 56 | 3 47 |
| 19 | 5 59 | 3 29 | 6 12 | 14 56 | 14 31 | 2 47 |
| 21 | 6 6 | 3 1 | 6 54 | 15 17 | 14 2 | 1 48 |
| 23 | 6 11 | 2 31 | 7 36 | 15 34 | 13 30 | 0 48 |
| 25 | 6 13 | 1 59 | 8 17 | 15 49 | 12 55 | 0 fa. 12 |
| 27 | 6 14 | 1 26 | 8 58 | 16 1 | 12 17 | 1 12 |
| 29 | 6 12 | 0 52 | 9 37 | 16 10 | 11 36 | 2 11 |
| 31 | 6 8 | 0 16 | - - - | 16 16 | - - - | 3 10 |
JOHN CHILDS AND SON, PRINTERS.