OBSERVATIONS 

 Observations with the Santiago Equatorial Continued. 



clxis 



B. OBSERVATIONS OF MARS II. WITH THE SANTIAGO MERIDIAN-CIRCLE. 

 The only remarks needed, relative to this series, are these : 



Page 309, note k, for V 21': 30 read 1' 21". 27. 



311, the observation N. 7 has not been used. 



312, Jan. 28. For 24 28' 5fi".97 rend 24 28' 63".97. 



312, Feb 1. The sign of Nadir-reading should be positive. 



313, note I. The star is measured from Bessel 341. 

 314, /and g. Keference-letters should be transposed. 

 318, Mar. 23. For 24 33' 35".04 read 22 33' 35".04. 



The observations in this series are of two classes : the first, consisting of microscope-readings 

 after setting the fixed thread upon the limb of the planet ; the second, of micrometric differences 

 from some near star. The latter cases are indicated in the foot-notes. This second class of 

 observations has been treated like the micrometric measurements ; with the equatorial and the 

 measured differences applied to the star-place, not as it was observed on that day, but as de- 

 rived from our General Catalogue. This being kept in view, we deduce the appended table, in 

 which the semi-diameter is not applied ; inasmuch as this is derived from computation, and 

 incorporated in the computed place of the observed limb. 



