Professors TJ. S. Navy. 



570 REPORTS OF AMERICAN OBSERVATORIES. 



I. Personnel: 

 Director : Bear- Admiral John Bodgers, U. S. N. 

 Assistants : 1. Prof. A. Hall. 1 



2. Prof. W. Harkness, 



3. Prof. J. B. Eastman, > 



4. Prof. E. S. Holden, 



5. Prof. E. Frisby, ^ 



6. Mr. A. E. Skinner, ") _ . + . » * 



_ TTT I Permanent Assistant Astron- 



7. Mr. H. W. Paul, > 



o T»r xx ci -r» omers. 



8. Mr. H. S. Pritchett, ) 



9. Mr. J. A. Bogers, 



Temporarily employed in photographic experiments. 

 10. Mr. W. F. Gardner, 



Instrument-maker. 



II. Instruments : 



(a) Meridian circles : 1 ; makers, Pistor & Martins ; diameter of 

 circles, 43.40 inches ; divided to 2' ; read by 4 microscopes to 0".l ; 

 aperture of objective, 8.52 inches ; for observations of the sun, aperture 

 employed, 3 inches ; magnifying power ordinarily employed, 180 diam- 

 eters. 



(b) Meridian transit instruments : Makers, Ertel & Son, aperture 

 5.33 inches ; magnifying powers 85, 80, 100, 118, 102. 



(6') Eight portable transits and zenith telescopes combined, used on 

 Transit of Venus Expeditions. 



(c) Equatorial instruments : Makers, Alvan Clark & Sons ; aperture 

 of objective, 20 inches ; magnifying powers of eyepieces, 120 to 1000. 



(&) Made by Merz : 9.02 inches aperture ; powers, 90-900. 



(c") Eight 5-inch equatorials by Alvan Clark & Sons, used on 

 Transit of Venus Expeditions. 



(e) Photometers : One nebula-photometer (Hastings' pattern) for use 

 with the 20-inch equatorial. 



(/) Chronographs : Some 10 or 12 in all, of various kinds. 



(g) Clocks : Mean time, 2 ; sidereal, 0. 



(h) Chronometers: Mean time, all the chronometers of the United 

 States Navy are kept here. Sidereal, eight, by Negus. 



III. Observations during the past year : 



(a) American ephemeris and miscellaneous stars ; south stars of the 

 B. A. C, many asteroids, and the Sun, Moon, and planets. 



(b) The transit and mural and prime vertical transit are now out of 

 use. 



(c) Double stars, satellites of Mars, Saturn, Neptune, and Uranus, 

 and nebulae. 



((■') Occupations; and the finding of asteroids preparatory to their ob- 

 servation by the transit circle. 



(i) A series of daily photographs of the sun and photographic experi- 

 ments looking to eclipse-photography. 



