E R E A T A . 



Amount of rain for blank read 1.95 in. 



Mean temp. 1 P. M. " 34°. 2 " 32'.4 



Extreme range temp. " 48° " 40° 



Daily mean thermometer " 73°. 3 " 73°.5 



B.arom. mean of month " .30.993 " 30.093 



Mean temp, of month " 41°.l " 42°.5 



Mean temp, of month " 54°.9 " 54°.5 



Extreme range temp. •' 30° " 35° 



Daily mean thermometer " 47°.3 " 49°. 3 



Max. temp. 1 P. M. " 49° " 51° 



Extreme range temp. •' 35° " 370 



Mean temp, for month " 58°.5 " 58°.l 



Extreme range temp. " 42° " 43° 



Mean temp, of month " 61°.4 " 62°.0 



Barom. mean of month " 29.390 " 30.043 



Extreme range temp. " 36° " 38° 



Max. temp. 1 P. M. " 33° " 40° 



Mean temp, of month " 66°. 3 " 66°. 6 



Mean temp, of month •• 70°.0 " 70°.3 



Extreme range temp. •' 31° " 42° 



Barom. mean of month " 20.980 " 29.980 



Barom. mean of month ■' 20.977 " 29.977 



Extreme r.ange temp. •' 45° " 47° 



Mean temp. 1 P. M. " 60°. 1 " 60°.9 



Extreme range temp. " 26° " 28° 



Mean temp, of month ■' 49°.8 " 50°.0 



Mean temp. 10 P. M. " 30°. 7 " 29°.0 



Mean temp. 1 P. M. '• 34°. 4 " 34°.7 



Max. temp. 1 P. M. •' 57° " 51° 



Barom. mean at sunrise ■• 25.97 " 29.97 



Red. barom. mean 1 P. M. " 99.80 " 29.80 



Red. barom. mean of month " 35.027 " 30.027 



Red. barom. mean of month " 30.030 " 30.090 



Extreme range temp. " 35°. " 39°. 



Extreme range temp. •■ 31°. " 33°. 



geographical position of University Hall, as fixed by the determinations of the 

 coast survey, is lat. 41° 50' IT' N., long. 71° 23' 20" W. from Greenwich. 



The barometer used from the commencement of the register till May, 1847, was 

 constructed with a flexible leather bottom. It was a good one of its kind, and 

 gave average results which are probably reliable. In respect to the barometric 

 range and the absolute heights it was probably less accurate than for mean results. 



