78 



MR. RUMKERS OBSERVATIONS 



Equinox, March 1828, 



Containing Obsei'vations for determining' the Right Ascensions of /3 Hydri 



and a Eridani. 



The mean inside Temperature was 75°. 



For those days when equal altitudes but no declinations of the sun were 

 observed, the error of the clock has been derived from the Solar Tables. In 

 the present observations no corrections have been applied to the sun's distances 

 from the equinox derived froni the observed declinations ; and in the last equi- 

 nox this correction did not amount to one second in arc upon the mean of the 

 right ascensions. 



