326 
XLII. 
RBSTIMATE OF THE wre OF ar Beinn HILLS IN NEW 
AMPSHIR 
BY NATHANIEL BOWDITCH. 
a) DP 
THE White Hills in New Hampshire, which are the highest moun- 
tains in New England, have been estimated by Dr. Belknap in his his- 
tory of New Hampshire, to be above 10,000 feet above the level of | 
the sea; but from some barometrical observations, made in July 1804, 
by several gentlemen who ascended the mountains, it appears that his 
computation is by far too great, and that the real height does not much 
exceed 7000 feet. This will evidently appear by comparing the ob- 
servations given in the following Table. Those on the top of Mount 
Washington, the highest of the White Hills, were made by Doctor 
_ Cutler and Professor Peck. Those at Mr. Messervey’s in the town 
of Adams (not far from the foot of the mountain) were made by a 
person, who observed the state of the Barometer and Thermometer, 
at intervals of $0 minutes, the whole day the company were on the 
Mountain, ‘The observations at Salem were made by Doctor Holyoke, 
and those at Boston by the late Rev. Mr. Emerson. All these obset- 
yations were made in the shade. The Barometer varied but very lit- 
tle on the sea coast for several days before and after the 28th of July- 
The range from the 25th to the 30th of July at Salem was from’ 30°00 
to 30°11 ; and at Boston from 29-9 to 30°1. The smallness of these 
variations is jn general conducive tothe accuracy of the result of the 
calculation by barometrical observations. 
