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56
GAUSS AND WEBER ON TERRESTRIAL MAGNETISM.
Mean value of the Westerly Magnetic Declination at Göttingen.
| 8, a.m. | 1, p.m. | ||||
| 1834. | March, second half | 18 | 38 16·0 | 18 | 46 40·4 |
| April | 36 6·9 | 47 3·8 | |||
| May | 36 28·2 | 47 15·4 | |||
| June | 37 40·7 | 47 59·5 | |||
| July | 37 57·5 | 48 19·0 | |||
| August | 38 48·1 | 49 11·0 | |||
| September | 36 58·4 | 46 32·3 | |||
| October | 37 18·4 | 44 47·2 | |||
| November | 37 38·4 | 43 4·3 | |||
| December | 37 54·8 | 41 32·7 | |||
| 1835. | January | 37 51·5 | 42 14·4 | ||
| February | 37 3·5 | 42 29·4 | |||
| March | 34 47·5 | 44 55·2 | |||
| April | 32 57·7 | 46 31·6 | |||
| May | 32 13·4 | 45 17·1 | |||
| June | 32 56·4 | 44 41·3 | |||
| July | 34 8·0 | 44 42·8 | |||
| August | 34 12·4 | 46 56·8 | |||
| September | 33 21·2 | 44 27·6 | |||
| October | 33 23·0 | 43 5·3 | |||
| November | 36 15·3 | 43 49·5 | |||
| December | 35 25·9 | 40 19·1 | |||
| 1836. | January | 35 2·4 | 40 34·6 | ||
| February | 33 26·7 | 41 15·2 | |||
| March | 31 1·4 | 43 16·4 | |||
| April | 26 32·9 | 43 42·6 | |||
| May | 28 0·8 | 44 37·2 | |||
| June | 27 35·1 | 42 52·4 | |||
| July | 26 54·2 | 42 26·0 | |||
| August | 25 42·4 | 41 45·0 | |||
| September | 26 14·6 | 40 59·6 | |||
| October | 27 34·0 | 40 32·8 | |||
| November | 29 21·0 | 36 54·3 | |||
| December | 29 13·7 | 35 46·8 | |||
| 1837. | January | 27 35·3 | 37 46·2 | ||
| February | 27 35·6 | 36 28·3 | |||
| March | 24 44·2 | 39 4·2 | |||
Some combinations of these observations may now be noticed.
The difference between the declination of the morning and afternoon has one sign all through in the monthly means; the dependence of its magnitude on the season of the year will be perceived in the following tabular view:
