The extremes were 25° below, and 49° above zero. On the last day but one of the month, the cold suddenly relaxed; and on the 1st and 2d of March, a heavy and warm rain succeeded. This produced an uncommon rise in Deerfield river, and on the 3d of March, it had overflowed the ground where the above described phenomenon occurred, and did not recede from it for 24 hours. Its greatest depth there, was five feet. The snow was nearly one foot deep when the flood happened, and being a nonconductor of heat, the temperature of the surface of the ground was not probably much changed from its state in February, until the water came in contact with it. It may not be amiss to give the state of the thermometer on the last of February and beginning of March. 7_h._ A. M. 1½_h._ P. M. 10_h._ P. M. Wind, weather, &c. Feb. 27th, 15° below 0. 28° above 0. 32° above 0. South, clear. 28th, 31 above 45 ----- 31 ----- do. do. March 1st, 29 ----- 46 ----- 37 ----- N. E. rain. 2d, 46 ----- 49 ----- 37 ----- do. do. 3d, 30 ----- 35 ----- 29 ----- do. rain & clear. On the third of March, about sunset, some lads were sailing near the spot where the disruption appears, and saw the water in considerable agitation, with much bubbling, and at short intervals it was thrown up in several places to the height of 3 or 4 feet. They saw no rupture in the earth, although they came within two or three rods of the spot, and state the water to have been two feet deep. About one o'clock on the morning of March 4th, Mr. Seth Sheldon and family, living one mile south from this spot, and being awake, were alarmed by a loud report from the north, by which their house and furniture were much shaken. They compared the sound, though louder by far than they had ever heard from this cause, to that of a cracking in the earth by frost in severe weather. Some others living rather nearer the spot, were awakened by the same report. That the rupture in the earth was made at that time is probable, though not certain. It may be proper to state, that during the flood, no ice, except a few loose masses, was carried over, or near the spot where the disruption appears. This, therefore, could not have produced it. [Illustration: Disruption of the Ground by Frost. _N. & S. S. Jocelyn Sc. N.H._] Fig. 1. is a transverse section, taken with a theodolite, from Deerfield river 28 rods south, crossing the longer axis of the disruption at right angles. The scale is 4 rods to an inch, although in laying off the heights and levels, the exact proportion was a little varied, to render the irregularities of surface more distinct. The letters of reference correspond to those on fig. 2, and need no explanation.