138 



MEMOIES or THE NATIONAL ACADEMY OF SCIENCES. 



Position angle of contact; 



I. 240° r).'}'. 



II. 4GO 21'. 



III. 270° 44'. 



IV. 720 27'. 



Tlie observed times were as follows :* 



CONTACT I. 



For observing the I and IV contacts, I nsed the coinet-seeker brought from the Observatory. 

 Having no higlier power than 21 belonging to that instrument, I fitted one from the 3-inch equa- 

 torial, which on this instrument gave a magnifying power of 37. The instrument is mounted 

 equatorially on a brass standard of sufficient weight to secure steadiness. The dimensions of the 

 telescope are as follows : 



Clear aperture 4 inches ; reduced to IJ inches by cap. 

 Focal length 42 inches. 

 Magnifying power of eye-piece 37. 

 For marking the time I used a sounder connected with the chronograph, which in turn was 



• I have added to Mr. Browm'8 figures the results given in the Report of the French Eclipse Expedition. Comptes 

 Rendua, 1883, September 3.— E. S. H. 



