T I M 

 TABLE VII. For converting Mean Solar into Sidereal Time. 



RULE. Add the acceleration or the numbers found in the table cor. 

 responding to the given mean solar time, to that time, and it reduces it 

 to sidereal time. 



The application of this rule is evident, from the last example. 



Time, sidereal and mean solar. 



Given the hour in mean solar time, to find the sidereal time. 



RULE. To the given mean solar time apply the equation of time at the 

 preceding noon from the Naut. Aim., but with a contrary sign, which 

 gives the time since the sun's centre was on the meridian ; reduce this 

 time so corrected to sidereal time, by adding the acceleration from Tab. 

 VII. ; to which add the sun's R. A. at preceding noon from the Naut. Aim. 



Or thus at short 



Sid. time mean solar time 4- equation of time at prec. noon 4. ac- 

 celeration for that hour 4. sun's R. A. at prec. noon. 



Hence conversely, 



Mean sol. time sid. time sun'i R. A. at prec. noon accalera- 

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