146 ANNUAL, REPORT SMITHSONIAN INSTITUTION, 1919. 
The measures, both direct and reversed, were made by two meas- 
urers (Mr. Davidson and Mr. Furner), and the means taken. 
There was no sensible difference between the measurers, which is 
satisfactory, as it affords evidence of the similarity of the images 
on the eclipse and comparison and scale plates. 
The value of the micrometer screws (both in right ascension and 
declination) is 6.25''. 
18. The results of the measures are as follows : 
