American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 179
n; and at whatever angle it maybe set in the vertical arc, the true line shouldbe maintained. The general features of the instrument canbe readily comprehended by an inspection ofthe cut, which represents a small transit intend-ed expressly for the use of the watchmaker.The telescope T is hung on… … It will be seen that there is a level, L, thatrests with a pair of Ws on the axes in orderto enable the observer to adjust the line of theaxial motion to a perfectly horizontal posi-tion ; on the end of one of the axes is a circledivided into 360 degs. for the purpose of tak-ing vertical angles; in…
Clocks and watches
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