Equatorials. 1 



No. lc Portable Equatorial Telescope, as in cut. Cast iron pillar; 

 clock; prismatic illuminating arrangement; tangent screw motion brought down 

 to the eye-end. The telescope rests in a cradle-piece to which it is firmly ;ii t.-n-hrd 

 by two brass clasps. The telescope-tube is of brass, polished, and provided with 

 rack and pinion adjustment to focus; finder; five astronomical eye-pieces 60, 120, 

 200, 300 and 400 ; one solar eye-piece and one terrestrial pancratic eye-piece. The 

 declination circle is graduated on silver, two opposite verniers reading to minutes. 

 The hour circle is graduated on silver and has two sets of graduations and verniers. 



Price, as above* $135O.OO 



No. 2. Fixed .Equatorial Telescope. Aperture, 5 inches. Cast iron 

 pillar. Telescope is made of brass, tapering towards both ends. Rack and pinion 

 motion to eye-end; finder; five astronomical eye-pieces 60, 120, 200, 300 and 400; 

 first surface reflecting prism for viewing the sun ; diagonal eye-piece ; transit eye- 

 piece ; position micrometer at eye-end of telescope, graduated on silver and reading 

 to minutes, with quick and slow motion clamp and tangent screws ; large declina^ 

 tion circle graduated on solid silver and read by microscope from eye-end, with 

 coarse graduation on edge for rough setting ; hour-circle graduated on silver with 

 two sets of graduations; driving clock, which can be changed from sidereal to 

 lunar rate, and additional slow motion in right ascension and declination by means 

 of rods and handles brought down to the eye-end ; striding level to determine the 

 horizontal position of the declinatior axis in order to use the instrument as a 

 transit; prismatic illumination arrangement for micrometer, declination and posi- 

 tion circles. Best qualiiy. 



Price, as above, $215O.OO 



No. 3. Fixed Equatorial Telescope, as in No. 2, best quality, but with 

 6-inch aperture and 6 eye-pieces 35 85, 155, 240, 300 and 490. 



Price, $3150.00 



See Preface 



