15° above zero—Unpleasantly warm.
Zero—Mild and agreeable.
10° below zero—Pleasantly fresh and bracing.
20° below zero—Sharp, but not severely cold. Keep your fingers and toes in motion, and rub your nose occasionally.
30° below zero—Very cold; take particular care of your nose and extremities: eat the fattest food, and plenty of it 40° below—Intensely cold; keep awake at all hazards, muffle up to the eyes, and test your circulation frequently, that it may not stop somewhere before you know it.
50° below—A struggle for life.
* We kept a record of the temperature from the time we left Sundsvall (Dec. 21) until our return to Stockholm. As a matter of interest, I subjoin it, changing the degrees from Reaumur to Fahrenheit. We tested the thermometer repeatedly on the way, and found it very generally reliable, although in extremely low temperature it showed from one to two degrees more than a spirit thermometer. The observations were taken at from 9 to 8 A. M., 12 to 2 P. M., and 7 to 11 P. M., whenever it was possible.
| | Morning. | Noon. | Evening. |
| December 21 | + 6 | -- | zero. |
| December 22 | + 6 | -- | - 3 |
| December 23 | -22 | -29 | -22 |
| December 24 | - 6 | -22 | -22 |
| December 25 | -35 | -38 | mer. frozen. |
| December 26 | -30 | -24 | -31 |
| December 27 (storm) | -18 | -18 | -18 |
| December 28 (storm) | zero. | zero. | zero. |
| December 29 | - 6 | -13 | -13 |
| December 30 | - 6 | -13 | -22 |
| December 31 (storm) | - 3 | + 9 | + 9 |
| January 1, 1857 | + 3 | + 3 | + 3 |
| January 2 | - 6 | - 6 | - 6 |
| January 3 | -30 | -22 | -22 |
| January 4 | -18 | -- | -22 |
| January 5 | -31 | -30 | -33 |
| | | |
| January 6 | -20 | - 4 | zero. |
| January 7 | + 4 | +18 | +25 |
| January 8 | +18 | -- | -11 |
| January 9 | -28 | -44 | -44 |
| January 10 (storm) | - 5 | -- | - 2 |
| January 11 (storm) | - 2 | zero. | - 5 |
| January 12 (storm) | - 5 | - 4 | - 4 |
| January 13 (storm) | + 5 | + 5 | + 5 |
| January 14 | - 6 | -13 | - 64 |
| January 15 | - 8 | -13 | -33 |
| January 16 | - 9 | -10 | -11 |
| January 17 (fog) | zero. | zero. | zero. |
| January 18 | -10 | -18 | -23 |
| January 19 (storm) | - 3 | - 3 | - 9 |
| January 20 | +20 | -- | + 6 |
| January 21 | - 4 | zero. | zero. |
| January 22 | + 2 | - 6 | -13 |
| January 23 | -13 | - 3 | -13 |
| January 24 | -15 | -22 | -44 |
| January 25 mer. froz. | -50? | -42 | mer. frozen |
| January 26 | -45 | -35 | -39 |
| January 27 frozen | -47? | -45 | -35 |
| January 28 frozen | -49? | -47 | -44 |
| January 29 | -47? | -43 | -43 |
| January 30 | -27 | -11 | -35 |
| January 31 | -17 | -16 | - 7 |
| February 1 | zero. | - 9 | -13 |
| February 2 | + 2 | + 6 | zero |
| February 3 | zero. | zero. | zero. |
| February 4 | - 9 | zero. | - 3 |
| February 5 (storm) | + 3 | + 3 | + 3 |
| February 6 | +25 | +25 | +18 |
| February 7 | +14 | +18 | +25 |
| February 8 | +25 | +39 | +22 |
| February 9 | + 5 | +22 | +16 |
| February 10 | +25 | +37 | +37 |
| February 11 | +34 | +34 | +32 |
| February 12 | +32 | +37 | +23 |
| February 13 | +16 | +30 | +21 |
| February 14 | +25 | +30 | +25 |