 | 1881 - 162 halaman
...in the dome to six inches, and put on an eyepiece similar to that used on the small refractor. Both telescopes were then pointed to the North Pole. Two...small pointer which was added to the heliostat. The Washburn Observatory. The later trials were made with the heliostat . mirror set for the place of the... | |
 | United States. Congress. House - 1883 - 896 halaman
...fitted for the purpose, and was in perfect order. " Observations were made to find stars in the daytime every clear day between June 15 and July 12, without...heliostat mirror was pointed was fixed by setting ou the suu at a given hour ; and the fact that this setting was not changed by accident was established... | |
 | Smithsonian Institution. Board of Regents - 1884 - 886 halaman
...fitted for the purpose, and was in perfect order. " Observations were made to find stars in the daytime every clear day between June 15 and July 12, without...small pointer which was added to the heliostat. "The latter trials were made with a heliostat mirror, set for the place of the brightest star in the Pleiades,... | |
 | Smithsonian Institution. Board of Regents - 1884 - 888 halaman
...fitted for the purpose, and was in perfect order. "Observations were made to find stars in the daytime every clear day between June 15 and July 12, without...pointed was fixed by setting on the sun at a given honr ; and the fact that this setting was not changed by accident was established by observing the... | |
 | Smithsonian Institution. Board of Regents - 1884 - 888 halaman
...fitted for the purpose, and was in perfect order. " Observations were made to find stars in the daytime every clear day between June 15 and July 12, without...the sky to which the heliostat mirror was pointed wan fixed by setting on the snn at a given honr ; and the fact that this setting was not changed by... | |
 | Smithsonian Institution. Board of Regents - 1884 - 892 halaman
...in perfect order. " Observations were made to find stars in the daytime every clear day between Jnne 15 and July 12, without result. The place in the sky to which Ihe heliostat mirror was pointed was fixed by setting on the snn at a given hour ; and the fact that... | |
 | Smithsonian Institution. Board of Regents - 1884 - 890 halaman
...fitted for the purpose, and was in perfect order. " Observations were made to find stars in the day time every clear day between June 15 and July 12, without result. The place in the sky to which (he heliostat mirror was pointed was fixed by setting on the sun at a given hour ; and the fact that... | |
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The excellent heliostat lent by Dr. SP Langley, director of the Allegheny Observatory, was placed on its pier June 12, and adjusted. This instrument was exactly fitted for the purpose, and was in perfect order. " Observations were made to find stars in... 