E.. Loomis— Reduction of Barometric Observations. 11 
ity of the winds on Mt. Washington not only at the dates of 
the forty cases in table V, but also at several of the preceding 
observations, and the principal results are exhibited in a con- 
densed form in the last column of table V. ene n only one wind 
carresponds to a 5 dine sixteen hours previous to that in column 
second, with the exception of the cases in which the direction 
of the wind is included in brackets. In these cases the date of ° 
the observation immediately precedes the wind’s direction. The 
forty cases shown in table V correspond to twenty-one differ- 
ent areas of low pressure, as was indicated in my fifteenth paper. 
Two of these storm areas began with a N.E Mt. 
Washington; one began with an E. wind; five began with a 
(Sy wind ; four with a 8. wind; and six ‘with a S.W. wind. 
One of the remaining cases was preceded by a calm, and one of 
those which began with a S.W. wind was also preceded by a 
calm. In the two remaining cases, the wind, as er: in the 
tri- “daily observations, blew continually from the W., . or 
N., but its velocity at one of the early observations was consid- 
erably less than at the observations immediately preceding ahd 
ollowin 
The elves storms which began with a wind from the N. Wie 
.—S.E—or 8. are regarded as unquestionably cyclonic; and 
the six which began with a 8. W. wind are be atta as probably . 
cyclonic. In the three remaining cases, one of whic an with 
acalm, and the other two with a sodipareivels feeble wind 
from the N. or N.W. the evidence of a cyclonic motion is 
unsatisfactory unless it vi confirmed by other circumstances. 
ave endeavored to obtain additional evidence bearing upon 
this question, from observations of the upper clouds nee at 
neighboring stations on the E. and S.E. sides of ash- 
Wind. Aierog 
1872. Nov. 1.2, Portland, Me..| N.W.18| 5S. 
1872. Nov. 30.2, Portland, Me.-| S.W. 18] S. 
1873. Feb, 8.1, Portland, Me..| S.W. 12 | N.E. 
1873. Mar. 17.2, Portland, Me..| N.W.18|N.E. - 
1873. Mar. 18.1, Portland, Me..| SW. 8| S.E 
1873. Dec. 9.2, Portland, Me..| S.W. 8]. E. 
1875. Jan. 14.2 eRe oe 
