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FAUTH k CO., WASHINGTON, D. C. 23 
This is an entirely novel form of Transit made by us for the United 
States Coast Survey, and designed by G. N. Saegmuller, Chief Mecha¬ 
nician, U. S. C. S. It is intended to be set up in the prime vertical, 
so that the telescope points due east and west. By the use of a pris¬ 
matic objective, any star that passes the meridian will be reflected 
and seen in the field, as it is evident that when the instrument is set 
up correctly, by turning it in its'bearings it will sweep the meridian. 
The pivot-rings are of phosphor-bronze, and, to avoid flexure as much 
as possible, these rings are again connected by a tube, so that the 
telescope body is really double. By onei of the three setting-screws 
the instrument is moved in Azimuth. It is provided with a reversing 
apparatus, which also carries the illuminating lamp. The fine level 
over the telescope is held by a projection from the reversing appa¬ 
ratus, which secures this great advantage, that the level need not 
be taken off on reversing the instrument; it also stays on whether 
observing in the zenith or horizon. Behind the micrometric eye-piece, 
two setting-circles are attached, with level alidades, divided on silver, 
and reading to minutes. One of these carries also the fine Latitude 
Level, which is chambered, and reads to single seconds. We make 
this instrument of different sizes, and being, by nature of its construc¬ 
tion, of an exceedingly simple and portable form, it is especially 
adapted for work in a rough or mountainous country. 
No. 40.—This instrument, with a telescope of 2J-inch clear 
aperture, similar to cut, and packed complete in box, with 
two eye-pieces, illuminating and reading lamp, and all 
accessories........... $790.00 
No. 41.—The same, with telescope 2-inch aperture, one set¬ 
ting-circle, in other respects similar to No. 40, packed com¬ 
plete....'.. 555.00 
No. 42.—Same as No. 41, but without reversing apparatus. 450.00 
