FAUTH & CO., WASHINGTON, D. C. 21 
No. 38.—The frame of this instrument consists of two parts, 
the upper part with the uprights revolving upon the lower, 
to which it can he firmly clamped if used as a Transit. 
When used as a Zenith instrument, the clamp-screws are 
removed ; stops and tangent-screw motion for turning it ex¬ 
actly 180° around are provided. When desired, two verniers 
and scale are attached to the upper and lower base. The tele¬ 
scope has a clear aperture of 2£ inches, and about 28 inches 
focal length. It is provided with micrometric eye-piece ; two 
setting-circles, divided on silver, and reading to minutes, are 
attached to the telescope-tube near the eye-end ; one of these 
carries the delicate Zenith level, which reads ,to single sec¬ 
onds and is chambered, in addition to the ordinary finding 
level. The clamp is of the improved Davidson pattern, and 
has this advantage over the old form: that, in being open 
on top, it has not to be carried around with the telescope 
when reversing it. The pivots are of phosphor bronze, and 
finished with the utmost care; bearings are agate. The 
illumination is effected through the pivots; the striding 
level is chambered, and reads to single seconds. A Rams- 
den eye-piece, diagonal eye-piece, with pancratic draw, two 
illuminating and one reading lamp, are provided. The 
stand folds and is packed in box with the telescope. Price, 
complete..... $990.00 
No. 39.— The same, with solid frame, not revolving, but with 
addition of reversing apparatus, in other respects similar 
to No. 38 ........ 850.00 
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