384 Ohservations of the Transit of Venus. 



XXVI. — Observations of the Transit of Venus, December 6. 1882. 



BY J. K. KEES, 

 Director of the Observatory of Columbia College, N. Y. City. 



Read December 11, 1882. 



The station occupied was the roof of the unfinished Observa- 

 tory of Columbia College, vi^here the telescope was placed at the 

 southwest corner. This roof is extraordinarily strong and 

 solid. The beams are of iron, 12 inches in de})th; and solid 

 brick arches spring from beam to beam. The hight of the roof 

 from the street is about 110 feet, and the walls supporting it ai'e 

 four feet thick. An unobstructed view Avas had of the whole 

 transit. 



The position of the instrument was a few feet only from the 

 centre of the old Observatory ; so that we may take the longi- 

 tude and latitude of our instrument from the American Ephe- 

 meris. 



Latitude, + 40° 45' 23". 1. 



Eeduction to Geocentric Lat., — 11' 22". 7. 



Log. p = 9.999384. 



Longitude — 



h. m. s. 

 From Washington, — 12 18.40. 



h. m. s. 

 From Greenwich, -|- 4 55 53.69. 



The time-pieces used were a mean-time chronometer. No. 

 1853, made by Parkinson & Frodsham, of London, England, 

 and a sidereal chronometer. No. 1564, made by Negus & Co., 

 of New York City. 



