OF ARTS AND SCIENCES. 



153 



called the "Diffuse" Light. Only those at the elongation 90° are 

 sufficiently numerous, in comparison with the total numbers of obser- 

 vations used in determining the successive positions of the ecliptic, to 

 allow us to attach much significance to the result from them. Still, 

 the observations at G0° may be worth examining, and they are ac- 

 cordingly included in Table II. The first two columns of this table 

 give the numbers of the successive groups of the observations of 

 Jones and the total number of observations belonging to each group. 

 These data are repeated from Table I. It is unnecessary to repeat 

 the corresponding data for the position of the ecliptic. The rest of 

 Table II. consists of two parts, relating to the " Diffuse " Light at the 

 respective elongations 60° and 90°. Each part gives data correspond- 

 ing to those for the " Stronger " Light found in Table I. 



TABLE II. 



These results exhibit more irregularity than those found for the 

 " Stronger " Light, but seem on the whole to agree with them. 

 The view of Serpieri, however, is supported by the observations of 

 the " Diffuse " Light at the elongation 90°. The observations of the 

 second and fifth groups were made, as we have seen, in about the same 

 terrestrial latitude, and give approximately the same value for the 

 "latitude of the axis," while larger values are furnished by the third 

 and fourth groups, the observations of which were made at more 

 northern stations. It will be sufiiciently apparent by inspection of 

 Table X. that no very great change would be made in the assumed 

 position of the ecliptic, or of the observer's latitude, by computing 

 them for the second group from those observations only in which the 

 latitudes of the boundaries of the " Diffuse " Light were observed at 



