 | George Adams - 1813 - 576 pages
...moved outwards, and thus the telescope suited to different eyes. The tube cc with the spirit bubble is fixed to the telescope by a joint at one end, and a capstan headed screw at the other, to raise or depress it for the adjustment. The two supporters D,... | |
 | Frederick Walter Simms - 1834 - 134 pages
...distant object distinctly. The tube, cc, carrying the spirit-bubble, is fixed to the under side of the telescope by a joint at one end and a capstan-headed screw at the other, which sets it parallel to the optical axis of the telescope; at the opposite end is another screw,... | |
 | Basil Jackson - 1847 - 410 pages
...distant object distinctly. The tube, cc, carrying the spirit-bubble, is fixed to the under part of the telescope, by a joint at one end, and a capstan-headed screw at the other, which sets it parallel to the optical axis of the telescope. One of the Ys is supported in a socket,... | |
 | Thomas Baker - 1850 - 244 pages
...the same construction as those already described for supporting the theodolite. The spirit level II is fixed to the telescope by a joint at one end, and a capstain headed screw at the other, to raise or depress it for adjustment. (3.) Previous to using this... | |
 | Sir Henry Edward Landor Thuillier - 1851 - 826 pages
...together, and form one round staff, a very convenient form for portability, and, when opened out, to make a firm stand, be the ground ever so uneven. The spirit...view, which particular point is considered as the centre of this field of view. We must therefore place some fixed point hi the field of view, and in... | |
 | John Fry Heather - 1859 - 198 pages
...and, when opened out, to make a very firm stand, be the ground ever so uneven. The spirit level // is fixed to the telescope by a joint at one end, and...looking through a telescope a considerable field of view ia embraced ; but the measurements indicated by any instrumerit, of which the telescope may form a... | |
 | Robert Thornton (Engineer.) - 1863 - 144 pages
...mahogany legs, made in the same way as those described for supporting the theodolite. The spirit level LL is fixed to the telescope by a joint at one end, and...the other, to raise or depress it for adjustment. 3. Before using this instrument, the following adjustments must be attended to. (1.) The adjustments... | |
 | Henry S. Merrett - 1863 - 476 pages
...adjusted the eye-glass at D to a focus suitable to the observer. The tube E, with the spirit bubble, is fixed to the telescope by a joint at one end, and...capstan-headed screw at the other, to raise or depress it for the adjustment — that is, to set it parallel with the optical axis of the telescope. The telescope... | |
 | Henry S. Merrett - 1863 - 428 pages
...adjusted the eye-glass at D to a focus suitable to the observer. The tube E, with the spirit bubble, is fixed to the telescope by a joint at one end, and...capstan-headed screw at the other, to raise or depress it for the adjustment — that is, to set it parallel with the optical axis of the telescope. The telescope... | |
 | Thomas Baker (C.E.) - 1865 - 174 pages
...connected with brass joints to three mahogany legs, which support the instrument. The spirit level / / is fixed to the telescope by a joint at one end, and a capstain headed screw at the other, to raise or depress it for adjustment. (3.) Previous to using this... | |
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... of this field of view. We must therefore place some fixed point in the field, of view, and in the focus of the eye-piece, and the point to which the measurement will have reference will be that point of the object viewed, which... 
