Table III
Eccentricity, Longitude of the Perihelion, &c., &c., for Intervals of 10,000 Years, from 1,000,000 to 750,000 Years ago.
the glacial epoch of the Eocene period is probably comprehended within this table.
| I. | II. | III. | IV. | Winter occurring in aphelion. | |||
|---|---|---|---|---|---|---|---|
| Number of years before a.d. 1800. | Eccentricity of orbit. | Longitude of perihelion. | Number of degrees passed over by the perihelion. Motion retrograde at periods marked R. | V. Excess of winter over summer, in days. | VI. Midwinter intensity of the sun’s heat. Present intensity = 1000. | VII. Number of degrees by which the midwinter temperature is lowered. | VIII. Midwinter temperature of Great Britain. |
| ° ′ | |||||||
| 1,000,000 | 0·0151 | 248 22 | ° ′ | F. | F. | ||
| 990,000 | 0·0224 | 313 50 | 65 28 | ° | ° | ||
| 980,000 | 0·0329 | 358 2 | 44 12 | 15·3 | 906 | 26·1 | 12·9 |
| 970,000 | 0·0441 | 32 40 | 34 38 | 20·5 | 887 | 31·5 | 7·5 |
| 960,000 | 0·0491 | 66 49 | 34 9 | 22·8 | 878 | 33·8 | 5·2 |
| 950,000 | 0·0517 | 97 51 | 31 2 | 24·0 | 874 | 35·0 | 4·0 |
| 940,000 | 0·0495 | 127 42 | 29 51 | 23·0 | 878 | 34·0 | 5·0 |
| 930,000 | 0·0423 | 156 11 | 28 29 | 19·7 | 890 | 30·6 | 8·4 |
| 920,000 | 0·0305 | 181 40 | 25 29 | 14·2 | 910 | 25·0 | 14·0 |
| 910,000 | 0·0156 | 194 15 | 12 35 | ||||
| 900,000 | 0·0102 | 135 2 | R 59 13 | ||||
| 890,000 | 0·0285 | 127 1 | R 8 1 | ||||
| 880,000 | 0·0456 | 152 33 | 25 32 | 21·2 | 884 | 32·2 | 6·8 |
| 870,000 | 0·0607 | 180 23 | 27 50 | 28·2 | 859 | 39·0 | 0·0 |
| 860,000 | 0·0708 | 209 41 | 29 18 | 32·9 | 843 | 43·6 | −4·6 |
| 850,000 | 0·0747 | 239 28 | 29 47 | 34·7 | 837 | 45·3 | −6·3 |
| 840,000 | 0·0698 | 269 14 | 29 46 | 32·4 | 845 | 43·2 | −4·2 |
| 830,000 | 0·0623 | 298 28 | 29 14 | 29·0 | 857 | 40·0 | −1·0 |
| 820,000 | 0·0476 | 326 4 | 27 36 | 22·1 | 881 | 33·1 | 5·9 |
| 810,000 | 0·0296 | 348 30 | 22 26 | ||||
| 800,000 | 0·0132 | 343 49 | R 4 41 | ||||
| 790,000 | 0·0171 | 293 19 | R 50 30 | ||||
| 780,000 | 0·0325 | 303 37 | 10 18 | 15·2 | 907 | 26·0 | 13·0 |
| 770,000 | 0·0455 | 328 38 | 25 1 | 21·2 | 884 | 32·2 | 6·8 |
| 760,000 | 0·0540 | 357 12 | 28 34 | 25·1 | 870 | 36·0 | 3·0 |
| 750,000 | 0·0575 | 27 18 | 30 6 | 26·7 | 864 | 37·7 | 1·3 |
| 740,000 | 0·0561 | 58 30 | 31 12 | 26·1 | 867 | 37·0 | 2·0 |
| 730,000 | 0·0507 | 90 55 | 32 25 | 23·6 | 876 | 34·6 | 4·4 |
| 720,000 | 0·0422 | 125 14 | 34 19 | 19·6 | 890 | 30·6 | 8·4 |
| 710,000 | 0·0307 | 177 26 | 52 12 | 14·3 | 910 | 25·0 | 14·0 |
| 700,000 | 0·0220 | 208 13 | 30 47 | ||||