REMARKABLE HURRICANE. 13g 
number of five hundred were {wept off in the fpace of a 
mile. ‘The general direction of the hurricane was diffe- 
rent here from what it was in Salifbury, being from fouth- 
weft to north-eaft. Its extent was about three miles in 
length, and half a mile in width: Its duration not more 
than four minutes. The violence of the hurricane was 
probably as great at Haverhill, as it was at Salifbury: But 
as it pafled half a mile above or north-weft of the centre 
of the town, where the buildings were not very thick, the 
damage done by it was much lefs. 
To what extent the difturbance in the atmofphere reach— 
ed, cannot be exactly determined. Though it did not 
form whirlwinds of fuch force as to produce any remark- 
able effects at any other places but thofe mentioned above, 
it evidently extended to all the towns on Merrimack river, 
from the mouth to fome miles above Haverhill. In all the 
adjacent towns, the fudden change and different directions 
of the wind, with their effects in twifting the trees, corn, 
&c. were obferved to the diftance of fix or eight miles 
on each fide of the river. And yet there did not feem to 
be any very great alterations in the wezgbt or temperature 
of the atmofphere, at any confiderable diftance from the 
place where the winds were fo violent. At Bradford 
oppofite to Haverhill, and not more than a mile from 
the place where the damage was done, the barometer at 
7» a.M. ftood at 29,8! inches. At the time of the hur- 
ricane it fuddenly fell to 29,6:; and juft after to 29,53, 
which was its leaft height that day. By noon it rofe to 
29,71, and at 9" P.M. it got up to 29,8! ; alterations very 
common in this part of America. Farenheit’s thermome- 
ter in the morning was at 74.° ; at noon and g" p. M. it was 
one degree lower: The wind continuing very moderate 
between weft and north-welt from 8" a.m. till night. 
From thefe phenomena we may form fome probable 
conjeGtures as to the caufe and origin of the hurricane. 
What occafioned fuch a violent irregular commotion in the 
alls; 
