REPORTS OF ASTRONOMICAL OBSERVATORIES. (^>C>ij 



{h) Chronometer: siaoreal; maker, J. Fletcuer, London. 



[i) Miscellaneous: Sextant; Troughton & SiiiMS, London. 



Observations during tke past year (from September, 187*), 

 to September, 1880) : 



Besides regular transit observations for time, by the director and 

 assistants, tlie instruments have been used by the senior class of the 

 Kensselaer Polytechnic Institute for practice in astronomical observa- 

 tions. 



Work proposed for the coming year (1880-81) : 



This is expected to be similar to the work of the past year. 



Washington, District of Columbia. 



United States Xaval Observatory. 



Longitude from Greenwich, 5^' 8- 12«.09 W. 

 Latitude, 38° 53' 38".8 N. 

 Directors: M. F. Maury, 1841; 



J. M. GiLLiss, 18G1; 



C.H.Davis, 1805; 



B. F. Sands, 1867; 



Eear- Admiral John Eodgers, U. S. X., 1874. 

 Assistants : 1. Prof. A. Hall, "J 



13. Prof. W. Harkness, j 



3. Prof. J. R. Eastman, )■ Professors, U. S. Kavy. 



4. Prof. E. S. Holden, 



f 



5. Prof. E. Frisby, \ 



^•^^/•£'?:.^-.™''''' Irermanent Assistant Astron- 



( omers. 



7. Mr. H. W. Paul, 



8. Mr. H. S. Pritchett, 



9*. m. J. A. Rogers, Temiwrarihj employed in photographic 



experiments. 

 10. Mr. W. F. Gardner, Instrument-maker. 

 Created by the Xavy Department in 1833. Transferred in 1S43 to 

 University Square. In 1872 it came into possession of an equatorial ot 

 ALVAN CLARK & SoN, 32^ feet (9"^9) in focal length, and with an ap - 

 ture of 26 inches (0-65) ; by means of which A. Hall discovered the 

 . two satellites of Mars in 1877. 



(„) SaHi^S: one; makers, PisTOR & Maktin. ; flinn.etorot 

 circles 43.40 iucUes; divided to 2'; read by 4 microscoiies to U 1, ..'kt- 

 n^tf obiective, 8.52 inches; for observations of ^^^'^ZZ 

 ployed, 3 iucbes; magnifying power ordn.ardy <^V^^ 't ^^ ^. 



ture 3.33 inches; magnifying powers, So, bd, lOb, lit., 10- I" ) = 



