On the Horary Oscillations of the Barometer at Rome, 123 



fractionary parts of hours to the whole hours. 9.d, By apply- 

 ing the correction for level, being -^-q and the neutral point 

 30.000. 8c?, By making the correction for the temperature of 

 the mercurial column, which was done from the following table, 

 interpolated from that given in Daniell's Meteorological Es^ 

 says. ^ 



Temperature. 



The upper line contains the temperatures, the other three 

 the corrections in lOOOths of an inch. It may at first appear 

 that the following table might have been consolidated with the 

 first, but the number of interpolations and changes in the hours 

 render that impossible. To prevent repetition, the uncorrected 

 heights are not again given, nor the interpolated ones ; but any 

 one may be found by applying the two corrections contrary 

 to their signs to the corrected number in the last column, which 

 number — 044 for capillary action, and -{- .138 for a reduc- 

 tion to the sea-shore (from about 120 feet above it) will give 

 the true height of the barometer at 32®, andat the level of the 

 Mediterranean. 



