 Remove a, and open the slit by means of the milled head, not shown in cut, but which is at right angles to d d. When the slit is sufficiently open, the rest of the apparatus acts like an ordinary eyepiece, and any object can be focussed in the usual way....  How to Work with the Spectroscope - Page 29by John Browning (F.R.A.S.) - 1882 - 54 pagesFull view - About this book
 | Jabez Hogg - 1867 - 1456 pages
...and open the slit by means of the milled-head, not shown in cut, but which is at right angles to D D. When the slit is sufficiently open the rest of...little out of focus. Every part of the spectrum differs a little from adjacent parts in refrangibility, and delicate bands or lines can only be brought out... | |
 | Henry Enfield Roscoe - 1870 - 514 pages
...and open the slit by means of the milled head, not shown in cut, but which is at right angles to d d. When the slit is sufficiently open, the rest of...little out of focus. Every part of the spectrum differs a little from adjacent parts in refrangibility, and delicate bands or lines can only be brought out... | |
 | Henry E. Roscoe - 1869 - 372 pages
...and open the slit by means of the milled head, not shown in cut, but which is at right angles to d d. "When the slit is sufficiently open, the rest of...little out of focus. Every part of the spectrum differs a little from adjacent parts in refrangibility, and delicate bands or lines can only be brought out... | |
 | sir Henry Enfield Roscoe - 1869 - 396 pages
...and open the slit by means of the milled head, not shown in cut, but which is at right angles to dd. When the slit is sufficiently open, the rest of the...little out of focus. Every part of the spectrum differs a little from adjacent parts in refrangibility, and delicate bands or lines can only be brought out... | |
 | John Henry Pepper - 1869 - 722 pages
...and open the slit by means of the milled head, not shown in cut, but which is at right angles to I' D. When the slit is sufficiently open, the rest of...like an ordinary eye-piece, and any object can be focused in the usual way. Having focused the object, replace A, and gradually close the slit till a... | |
 | Edward Nugent - 1870 - 304 pages
...bull's-eye. &c. Remove A, and open the slit by means of the millheaded screw, H, at right angles to D D. When the slit is sufficiently open, the rest of...gradually close the slit till a good spectrum is obtained. Every part of the spectrum differs a little from adjacent parts in refrangibility, and delicate bands... | |
 | sir Henry Enfield Roscoe - 1870 - 452 pages
...and open the slit by means of the milled head, not shown in cut, but which is at right angles to d d. When the slit is sufficiently open, the rest of...acts like an ordinary eyepiece, and any object can lie focussed in the usual way. Having focussed the object, replace a, and gradually close the slit... | |
 | Henry Enfield Roscoe - 1873 - 542 pages
...and open the slit by means of the milled head, not shown in cut, but which is at right angles to dd. When the slit is sufficiently open, the rest of the...little out of focus. Every part of the spectrum differs a little from adjacent parts in refrangibility, and delicate bands or lines can only be brought out... | |
 | sir Henry Enfield Roscoe - 1873 - 550 pages
...and open the slit by means of the milled head, not shown in cut, but which is at right angles to d d. When the slit is sufficiently open, the rest of...improved by throwing the object a little out of focus. out by accurately focussing their own parts of the spectrum. This can be done by the milled head b.... | |
 | John Henry Pepper - 1877 - 764 pages
...and open the slit by means of the milled head, not shown in cut, but which is at right angles to D D. When the slit is sufficiently open, the rest of...like an ordinary eye-piece, and any object can be focused in the usual way. Having focused the object, replace A, and gradually close the slit till a... | |
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