The cold spell that began the evening of the 22d ended to-day noon.

January 24.

Thermometer about 6.30 a.m. in the bulb!! but Smith's on the same nail, -30°; Wilds', early, -16°; Emerson's, the same; at 9.15 a.m., ours, -18°; Smith's, -22°; which would indicate that ours would have stood at -26° at 6.30, if the thermometer had been long enough. 

At 11.30 a.m. ours was -1°, at 4 p.m., +12°. 

So the cold spell that began the evening of the 22d ended to-day noon.

H. D Thoreau. Journal, January 24, 1857

See January 23, 1857 ("The coldest day that I remember recording . . .I may safely say that -5° has been the highest temperature to-day . . ")