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" Instrument. — Very accurate determinations of the time were obtained on the six nights previous ; and one star and azimuth-mark, on the night following, by Dr. Copeland with the 4-in. reversing transit. All the photographic exposures are automatically... "
Astronomical Register: A Medium of Communication for Amateur Observers and ... - Page 36
1876
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The Popular Science Review: A Quarterly Miscellany of ..., Volume 14

James Samuelson, Henry Lawson, William Sweetland Dallas - 1875 - 440 pages
...the photographic exposures are automatically registered on the chronograph by a method which (fives the actual duration of the exposure. The heliometer observations were also registered thus: Dr. Copeland observed eye and ear — all other observations (photograhic and heliometric) were...
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Nature, Volume 11

Sir Norman Lockyer - 1875 - 544 pages
...be classed under the head " black drop " took place and disappeared within a period of five seconds. All the photographic exposures are automatically registered...observed by eye and ear as a check on the chronograph. The German expedition under Dr. Low got the third and fourth contacts, with three complete sets of...
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Monthly Notices of the Royal Astronomical Society, Volume 35

Royal Astronomical Society - 1875 - 450 pages
...nights previous ; and one star and azimuth-mark, on the night following, by Dr. Copeland with the 4-in. reversing transit. All the photographic exposures...exposure. The heliometer observations were also registered thus : Dr. Copeland observed eye and ear — all other observations (photographic and heliometric)...
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Nature, Volume 11

Sir Norman Lockyer - 1875 - 538 pages
...be classed under the head " black drop " took place and disappeared within a period of five seconds. All the photographic exposures are automatically registered...heliometer observations were also registered there. Dt. Copeland observed by eye and ear ; all other observations (photographic and heliometric) also observed...
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The Popular Science Review: A Quarterly Miscellany of ..., Volume 14

James Samuelson, Henry Lawson, William Sweetland Dallas - 1875 - 486 pages
...nights previous ; and one star and azimuth-mark on the night following, by Dr. Copeland with the 4-in. reversing transit. All the photographic exposures...automatically registered on the chronograph by a method which (fives the actual duration of the exposure. The huliometer observations were also registered thus:...
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Monthly Notices of the Royal Astronomical ..., Volumes 35-36; Volumes 1874-1875

Royal Astronomical Society - 1876 - 876 pages
...nights previous ; and one star and azimuth-mark, on the night following, by Dr. Copeland with the 4-in. reversing transit. All the photographic exposures...exposure. The heliometer observations were also registered thus : Dr. Copeland observed eye and ear — all other observations (photographic and heliometric)...
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