68 



OCCULTATIONS AND ECLIPSES 



the close proximity of the stations, may be concentrated on the new 

 Observatory without danger of sensible error arising from an erro- 

 neous estimate of relative position. This important work would be 

 greatly facilitated by the communication of corresponding Europe- 

 an observations. 



In the column headed " Observer," B. denotes that the observa- 

 tion was made by Wm. Cranch Bond ; W., by W. C. Bond, Jr. ; 

 B.^ by G. P. Bond. 



The instrument generally employed for the earlier obsenations 

 was a reflector of four inches aperture. For the last six years, two 

 achromatics of three and two and three fourths inches aperture, and of 

 nearly four feet focal length, equatorially mounted, have been used. 



The occultation of Jupiter, March 29th, 1846, was observed with 

 an equatorial, of four and one fourth inches aperture, and five feet 

 focal length. 



OCCTTLTATIONS AND ECLIPSES, 



Observed at Dorchester. Lat. 42'= 19' IT". Lon. 4' 44"- 17' W. 



