Meteorological Observations, 287 



being present. We have no doubt it will produce the most bene- 

 ficial eflfects to science, smoothing the asperities of rivalry, and 

 creating a personal bond between individuals, who have the 

 loftiest objects in view. Under the direction of great minds, the 

 influence of such institutions will be universally felt, and thus, 

 ere long, it will be acknowledged, that to study nature and na- 

 ture's laws, constitutes not only the most elevated, but the most 

 useful of occupations. Ed. 



METEOROLOGICAL OBSERVATIONS, 

 Kept at Wilmington^ Delaware, by Henry Gibbons, M, D. 

 Summary for August 1831. 



Therm. Barom. 



Average at sun-rise, 67°.23 in. 29.92 



Proportion of clear weather, days 18 

 Proportion of cloudy, 13 

 Whole days clear, 13 

 Days on which rain fell, 8 

 Depth of rain, inches 11.9 



Northerly wind prevailed, days 8 

 Easterly, 10 

 Southerly, (S. to W.) 13 



Average at mid-day, 78°.68 29.91 



Average at 10 P.M. 69°.74 29.91 



Monthly average, 72°.95 29.915 



Maximum, 85°50 30.15 



Minimum, 52° 29.68 



Range, 33°.50 .47 

 Warmest day (17th,) 80°. 

 Coldest day (29th,) 60°.50 



Auroras, none. That observed in Massachusetts, (noticed in the last number,) 

 on the 31st. ult. was followed by unsettled weather, and a severe easterly 

 storm in a week. A very wet month ; rains heavy ; nearly six inches fell 

 on the 8th and 9th. The early part of the month cool ; the remainder warm, 

 except the few last days. Winds generally light and variable. But few 

 electric clouds. A severe easterly storm on the 7th and 8th. A peculiar 

 haziness in the atmosphere during this month, and the last, which will be 

 noticed hereafter. 



Summary for September 1831. 



Therm. Barom. 



Average at sun-rise, 58°.03 in. 29.85 

 Average at mid-day, 70°.90 29.83 

 Average at 10 P. M. 60°.36 29.82 

 Monthly Average, 64°.46 29.84 

 Maximum, 83°. 30.04 



Minimum, 44°. 29.44 



Range, 39° .60 



Warmest day,(llth,)77° 

 Coldest days (17th 

 and 30th) 55°. 

 Auroras, none. A wet month ; rains frequent but not very heavy. Ge- 

 nerally cool ; only a few v^arm days. Winds not so light nor so changeable 

 as in the summer months. Electric clouds more frequent than in August 

 Four easterly storms, two of them light, and one not accompanied with rain. 

 A partial white frost on the 30th. 



Proportion of clear weather, days 16 

 Proportion of cloudy, . 14 



Whole days clear, 12 

 Days on which rain fell, 10 

 Quantity of rain, inches 7.25 



Northerly winds pevailed, days 11 

 Easterly, 7 

 Southerly, (S. toW.) 12 



