METEOROLOGICAL OBSERVATIONS. 135 



of the months, and from the monthly averages is derived the average 

 water for the thirty years. 



Besides the errors here corrected, there are several in the summing 

 of the Rochester reports in the State Meteorology. The longitude of 

 Rochester is too small by two degi-ees, which places this city two degrees 

 east of Aubiu-n instead of near as much west of it. The 10° below in 

 December, 1847, should be 10° above. On same page, 402, the mean 

 temperature of second half of May should be 58°.35, and not 38°.35 ; 

 and the mean at the bottom should be 36°.75, and not 45°.09. On page 

 403, the mean of May, 1846, should be 60°.82 ; and on page 404, the 

 water fallen in 1850 should be 38.46 inches, and not 32.47. On page 

 143, the water for 1841 should be 33.91, not 30.13 ; and water for 1847 

 should be 47.44, not 49.24 ; and for sixteen years the mean should be 

 36.56, not 36.68. 



