 Much of the beauty of the objects seen depends upon the management of the light that is thrown upon or behind them; which can only be fully mastered by practice. It may be remarked, however, as a general rule, that in viewing those which are transparent,...  Journal of the Royal Microscopical Society - Halaman 507oleh Royal Microscopical Society (Great Britain) - 1879Tampilan utuh - Tentang buku ini
 | Joseph Henry Wythe - 1851 - 204 halaman
...practice. It may be remarked, however, as a general rule, that in viewing those which are transparent, the plane mirror is most suitable for bright daylight;...concave for a lamp or candle, which should have the bulFs-eye lens, when that is used, so close to it that the rays may fall nearly parallel on the mirror.... | |
 | Joseph Henry Wythe - 1852 - 208 halaman
...practice. It may be remarked, however, as a general rule, that in viewing those which are transparent, the plane mirror is most suitable for bright daylight;...the mirror. If the bull's-eye lens is not used, the illuminating body should not be more than five or six inches from the mirror. The latter is seldom... | |
 | Joseph Henry Wythe - 1853 - 238 halaman
...practice. It may be remarked, however, as a general rule, that in viewing those which are transparent, the plane mirror is most suitable for bright daylight...the mirror. If the bull's-eye lens is not used, the illuminating body should not be more than five or six inches from the mirror. The latter is seldom... | |
 | Jabez Hogg - 1854 - 516 halaman
...practice. It may be remarked, however, as a general rule, that in viewing those which are transparent, the plane mirror is most suitable for bright daylight;...the mirror. "If the bull's-eye lens is not used, the illuminating body should not be more than five or six inches from the mirror. The latter is seldom... | |
 | Jabez Hogg - 1856 - 530 halaman
...practice. It may be remarked, however, as a general rule, that in viewing those which are transparent, the plane mirror is most suitable for bright daylight...the mirror. If the bull's-eye lens is not used, the illuminating body should not be more than five or six inches from the mirror. The latter is seldom... | |
 | Jabez Hogg - 1856 - 532 halaman
...practice. It may be remarked, however, as a general rule, that in viewing those which are transparent, the plane mirror is most suitable for bright daylight...close to it that the rays may fall nearly parallel ou the mirror. If the bull's-eye lens is not used, the illuminating body should not be more than live... | |
 | 1858 - 502 halaman
...practice. It may be remarked, however, as a general rule, that in viewing those which are transparent, the plane mirror is most suitable for bright daylight...the mirror. If the bull's-eye lens is not used, the illuminating body should not be more than five or six inches from the mirror. The latter is seldom... | |
 | John King - 1859 - 344 halaman
...objects, as a general rule, the plane mirror is most suitable for bright daylight ; the concave lor a lamp or candle, which should have the bull's-eye...the rays may fall nearly parallel on the mirror ; if this lens be not used, the illuminating body should not be more than five or six inches from the mirror.... | |
 | William Lowndes Notcutt - 1859 - 202 halaman
...all that can be given here. In viewing transparent objects, the plane side of the mirror is best in bright daylight : the concave, for a lamp or candle, which should have the bull's eye lens (when that is used) so close that the rays may fall nearly parallel on the mirror.... | |
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