 ... be 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, it should be made to fall obliquely,...  Journal of the Royal Microscopical Society - Halaman 508oleh Royal Microscopical Society (Great Britain) - 1879Tampilan utuh - Tentang buku ini
 | Joseph Henry Wythe - 1851 - 206 halaman
...seeing delicate lines, like those on the scales of insects, it should be made to fall obliquely, and in a direction at right angles to the lines to be viewed....the mirror. " If an achromatic condenser is employed instead of the diaphragm, its axis should correspond with that of the body; and its glasses, when adjusted... | |
 | Joseph Henry Wythe - 1851 - 204 halaman
...illumination is commonly best ; but for seeing delicate lines, like those on the scales of insects, it should be made to 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 halaman
...illumination is commonly best ; but for seeing delicate lines, like those on the scales of insects, it should be made to 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 halaman
...illumination is commonly best; but for seeing delicate lines, like those on the scales of insects, it should be made to 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 halaman
...illumination is commonly best ; but for seeing delicate lines, like those on the scales of insects, it should be made to 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... | |
 | 1858 - 502 halaman
...illumination is commonly best ; but for seeing delicate lines, like those on the scales of insects, it should be made to fall obliquely, and in a direction at right angles to the lines to be viewed. The diaphragm, fig. 7, is often of great use in modifying the light - 7. and... | |
 | John King - 1859 - 344 halaman
...seeing delicate lines, like 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....effects desired are best produced by admitting the whole light from the mirror. " If instead of the diaphragm, an achromatic condenser be used, its axis should... | |
 | William Lowndes Notcutt - 1859 - 202 halaman
...seeing delicate lines, like those on the scales of insects and shells of the navicula, &c., the light should be made to fall obliquely, and in a direction at right angles to the lines to be viewed. * For such objects, Mr. Pritchard recommends the black-ground illumination.... | |
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