ASTRONOMICAL OBSERVATORIES. 397 



Instruments : 

 (c) Equatorial instrument: Oneeqiuitorial; makers, Alvan Clark & 

 Sons; aperture of objective, SJ iucbes ; maguifyiug powers of eye- 

 Ijieces, 93, 121, 184, 311, 571 ; negatives, 518, 116, 230, 335, 375 ; positive 

 eve-pieces acbroiuatic, 248. 



" (d) Spectroscope: One by Browning, wbicb consists of 4 whole and 2 

 half prisms of GiP ; Hint glass ; gives a dispersive power of ten prisms 



by reflection. 



Chronometer : Sidereal ; maker, Victor Kullberg, London. 



Rive RD ALE, New York. 

 Private Observatory. 



Longitude from Washington, 



Latitude, • 



Director : William Meikleham. 



Observatory was removed from Fordham, N. Y. 



Instruments: 



(c) Equatorial instrument : Maker, John Byrne, of New York ; ap- 

 erture of objective, 4yV inches; focal distance, 05 inches; magnifying 

 powers of eye pieces, 20, 30, 45, GO, 80, 150, 250, 300, 350, and 450;- also 

 an amplifier, which doubles each of these powers wheu used. Attached 

 to the telescope is a finder of 1^ inches aperture, magnifying 21) diame- 

 ters. ' Eight ascension circle divided to read to 4 seconds of time ; dec- 

 lination circle divided to read to 1' of arc. Both circles divided on 

 silver and read by microscopes attached thereto. Driving clock. 



{(1) Spectroscope : One. 



{(/) ClocTc: Mean time; maker, Setii Thomas, Son,^ & Co. 



(0 Miscellaneous: Filar micrometer; divided on silver to measure 

 0".3 of arc in distance and G' in position, with suitable eye-pieces and 

 illuminating apparatus. 



Rochester, New York. 



Warner Ohservattri/. 



Longitude from Washington, 3"' 8« W. 

 Latitude, 43° 8' 15" W. 



Authority for longitude and latitude : Signal Service Officer. 

 Director: Lewis Swift., 

 Instruments : 

 (c) Equatorial instrument : Makers, Alvan Clark & Sons (construct- 

 ing) ; aperture of objective, IG iuches ; magnifying powers of eye- 

 pieces, from 45 to 2000. [c') Altitude-azimuth, U inches, by Fitz ; 

 powers from 25 to 432. Telescope 4i inch refractor, originally by Fitz, 

 but since last report the flint lens of the objective was unfortunately 



