390 ASTRONOMICAL OBSERVATORIES. 



{(j) Clocks: Two mean time; makers, Hobert Molyneux, James 

 EiTCHiE & Son. 



{//) Chronometer : Sidereal ; makers, William Bond & Son. 



(I) Miscellaneous: Magnetic tlieodolite; maker, Gasibey. Sextant; 

 makers, Stackpole «& Brother. Inclinometer time-ball, telegraphic* 

 apparatus, etc. 



MiDDLETOWN, CONNECTICUT. 



Observatory of ^yesleyan University. 



Longitude from Washington, . 



Latitude, . 



Director : Prof. J. M. Van Vleck. 



New Brunswick, New Jersey. 



Observatory of Rutgers College. 



Longitude from Washington, . 



Latitude, . 



Director : , 



Nashville, Tennessee. 



Observatory of Vanderbilt University. 



Longitude from Washington, 38™ 56* W. 



Latitude, 30° 10' 01" N. 



Authority for longitude and latitude: U. S, Coast Survey. 



Director: E. E. Barnard. 



Instruments : 



(c) Equatorial instrument: A simple equatorial; aperture of objective, 

 5 inches ; magnifying powers of eye-i)ieces, 52 to 520. (c') A small 2i 

 inches alt-azimuth telescope with good rack-work ; all the eye-pieces of 

 large telescope fit it. 



(i) Miscellaneous: In use also a small instrument. The base of this 

 instrument is divided to degrees and read by vernier to 3' of arc. An 

 upright pillar carries a semi-circle of altitude ; this is divided to degrees 

 and read to 3' of arc by a vernier. Attached to the semi-circle of alti- 

 tude is an hour-circle divided to 4'" of time and read to single minutes 

 by vernier. Ux^on the hour-circle rests a semi-circle of declination di- 

 vided to degrees and read to 3' of arc by vernier. On tfie base are two 

 levels, the instrument being leveled by three adjusting screws, which 

 also serve as feet. The declination semicircle carries a very small tele- 

 scope about .4 inch diameter of objective. The telescope has a diag- 

 onal eye-piece with metal reflector and single lenses and vertical and 

 horizontal hairs. The instrument was made by W. & S. Jones, London. 

 It is used for identifying stars in comet observations by setting the alti- 

 tude semi circle for the latitude, thereby converting the instrument into 

 an equatorial. 



