524 



Mctcorolos:iciil Observations. 



METEOROLOGICAL OBSERVATIONS, 



Made al Wilmington, Delaware, by Henry CUbhons, M. D. 

 Summary for Mauch, 1832. 



Therm. Barom. 



Average at sun-rise, 34°.81 in. 29.87 

 Average at mid-Jay, 49°.42 29.83 



AveraM at 11 o'clock, 



P. M. 

 Monthly average. 

 Maximum, 12th, 

 Minimum, 18th, 

 Range, 



Warmest day, 12th, 

 Coldest day, 18th, 



38°.23 29.84 

 42°. 115 29.85 

 67°. 1st, 30.30 

 12°. 12th, 29.37 

 55°. .93 



60°.55 

 18° 



Proportion of clear weather, days i\ 



Proportion of cloud)', 10 



Whole days clear, 14 



Days on which snow fell, 1 



Days on which rain fell, 7 



Depth of snow, in. 2 



Depth of rain, 2.55 



Quantity of water, 2.80 



Northerly winds prevailed, days 1 1 



Easterly, 5 



Southerly, (S. to W.) 15 



An aurora, on the evening of the 27th, followed by easterly- 

 winds. Clouds electrified twice ; a heavy thundergust on the 

 12th. Winds not very variable ; but blustering and frequently 

 high, supporting the character of March. Two transient, in- 

 complete, easterly storms. The weather of this month was re- 

 markable for its sudden transitions from warm to cold. The 

 temperature of the thirteen first days was pleasant and uniform, 

 averaging about 53° at noon. A severe thunderstorm took place 

 on the 12th, which was not followed immediately by much de- 

 crease of temperature. But a N. W. wind set in the next day, 

 and the thermometer fell from 57° (at 2 p. m.) to 35° (at lip. m.). 

 The next morning it stood at 20°. During this and the eight suc- 

 cessive days, the mean temperature at noon was S9^°. A change 

 still more remarkable took place on the 17th, when the mercury 

 fell from 47°, to 17°, between the hours of 2 and 11 p.m., during 

 a violent snow-storm from N. West. On the morning of the 

 18th, it was at 12°, a degree of cold extremely unusual at this 

 late period. .The weeping willow had put forth its leaves, and 

 the blossoms of the Lombardy and Athenian poplar were out. 

 The leaves of the one, and the blossoms of the other, were com- 

 pletely destroyed, and the buds of the willow were so elFectually 

 killed, that the tree continued without any trace of vegetation 

 till after the middle of April, when it put forth a new set of buds. 

 The fruit of the peach-tree was killed by the same frost, in the 

 unexpanded bud, so that few, comparatively, of the blossoms, 

 subsequently opened. 



