 | George Adams - 1813 - 576 σελίδες
...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 σελίδες
...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 σελίδες
...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 σελίδες
...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 σελίδες
...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 σελίδες
...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 σελίδες
...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 σελίδες
...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 σελίδες
...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 σελίδες
...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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In looking through a telescope a considerable field of view is embraced ; but the measurements indicated by any instrument, of which the telescope may form a part, will only have reference to one particular point in this field of view, which particular... 
