 ... should be, especially by lamplight, in the axis of the microscope. For obscure objects, seen by transmitted light, and for outline, a full central illumination is commonly best ; but for seeing delicate lines, like those on the scales of insects,...  Quarterly Journal of Dental Science - Page 1241858Full view - About this book
 | Joseph Henry Wythe - 1851 - 206 pages
...rays from the mirror fall upon it before crossing, and the centre should (especially by lamp-light) be in the axis of the microscope. For obscure objects,...fall obliquely, and in a direction at right angles to the lines to be viewed. " The diaphragm is often of great use in modifying the light, and stopping... | |
 | Joseph Henry Wythe - 1851 - 204 pages
...rays from the mirror fall upon it before crossing, and the centre should (especially by lamp-light) be in the axis of the microscope. For obscure objects,...fall obliquely, and in a direction at right angles to the lines to be viewed. " The diaphragm is often of great use in modifying the light, and stopping... | |
 | Joseph Henry Wythe - 1852 - 208 pages
...rays from the mirror fall upon it before crossing, and the centre should (especially by lamp-light) be in the axis of the microscope. For obscure objects,...fall obliquely, and in a direction at right angles to the lines to be viewed. " The diaphragm is often of great use in modifying the light, and stopping... | |
 | Jabez Hogg - 1854 - 516 pages
...the beauty of the objects seen depends upon the management of the light that is thrown upon or behiud them, which can only be fully mastered by practice....fall obliquely, and in a direction at right angles to the lines to be viewed. " The diaphragm is often of great use in modifying the light, and stopping... | |
 | Jabez Hogg - 1854 - 550 pages
...contributed the subjoined practical observations on the same subject to the Microscopical Transactions:— general rule, that in viewing those which are transparent,...fall obliquely, and in a direction at right angles to the lines to be viewed. " The diaphragm is often of great use in modifying the light, and stopping... | |
 | Jabez Hogg - 1856 - 530 pages
...Microscopical Transactions: Much of the beauty of the objects seen depends upon the management of the ligUt that is thrown upon or behind them, which can only...fall obliquely, and in a direction at right angles to the lines to be viewed. The diaphragm is often of great use in modifying the light and stopping such... | |
 | Jabez Hogg - 1856 - 532 pages
...centre should be, especially by lamplight, in the axis of the microscope. For obscure objects, seeu by transmitted light, and for outline, a full central...fall obliquely, and in a direction at right angles to the lines to be viewed. The diaphragm is often of great use in modifying the light and stopping such... | |
 | John King - 1859 - 344 pages
...the mirror fall upon it before crossing, and the center should (especially by artificial light) be in the axis of the microscope. For obscure objects,...those on the scales of insects, it should be made to iall obliquely, and in a direction at right angles to the lines to be viewed. — The diaphragm is... | |
 | Royal Microscopical Society (Great Britain) - 1879 - 1036 pages
...are best shown when the rays from the mirror fall upon it before crossing, and the centre (of mirror) should be, especially by lamplight, in the axis of...illumination is commonly best ; but for seeing delicate lines (eg on insect scales) it should be made to fall obliquely and in a direction at right angles to the... | |
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