392
(d ) Spectroscope : By A. Clark & Sons, of 7 prisms twice traversed.
(/) Chronographs: One by A. Clark & Sons, with conical pendulumgovernor; another by William Bond & Sons, Boston , with Bond’sspring governor.
(g) Clocks: One mean time, made by E. Howard & Co., Boston ;one by WilliamHilliiouse, New Haven; one sidereal, by WilliamBond & Son, Boston; one by Appleton, London ; one by E. How-ard & Co.
(h) Chronometers: One pocket chronometer, mean time, by Johnson,London; one sidereal, by Pool, London, improved by Negus, NewYork .
( i ) Miscellaneous : Two bifilar position-micrometers, one by Dollond ,the other by Fautii & Co., Washington, D. C. ; a patent sextant anda patent reflecting circle, by Pistor & Martins, Berlin; repeatingrelays, sounders, etc., for time service. Yale College has also in use a5 inch 10-foot refractor by Dollond , a sidereal clock, and a 20-inchtransit instrument, in charge of Professor Loomis.
Observatory.
Authority for longitude and latitude: U. S. Coast Survey, 1859, p.
265; Connaissance des Temps, Paris , 1884, p. lx.
Director: --.
Private Observatory.
Longitude from Washington , 53 m 53 s W.
Latitude, 41° 13' N., approximately.
Authority for longitude: telegraphic time signals direct from U. S.Naval Observatory at Washington on December 4, 5, 6, 7,1882; for latitude, own determination.
Director: Edgard L. Larkin.
Permanent observatory; brick pier and revolving dome.Instruments:
(c) Equatorial instrument: Makers, Alvan Clark & Sons; apertureof objective, 6 inches; magnifying powers of eye pieces, 27, 60,130, 250,300, 600, with prism* and solar eye-piece. Two of the eye-pieces areGundlach’s periscopic.
(g) Clock: Sidereal; ordinary clock.
ti) Miscellaneous: Planisphere , charts, maps, and catalogues.