Publications of the Astronomical Society of the Pacific, Volumes 3-4Astronomical Society of the Pacific, 1891 |
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Page xi
... Plates of Jupiter's Satellite III . Notices from the Lick Observatory . to face pages 359 and 361 FRANZ FRIEDRICH ERNST BRUENNOW , translated from the German of Professor A. KRUEGER , by J. M. SCHAEBERLE . . 367 Portrait of Professor ...
... Plates of Jupiter's Satellite III . Notices from the Lick Observatory . to face pages 359 and 361 FRANZ FRIEDRICH ERNST BRUENNOW , translated from the German of Professor A. KRUEGER , by J. M. SCHAEBERLE . . 367 Portrait of Professor ...
Page 26
... plate ; because , since the coronal rays diminish in brightness as they recede from the sun , a limit must be reached , when the faintest beams will be of equal brightness with the illuminated air : then , and only then , will they fail ...
... plate ; because , since the coronal rays diminish in brightness as they recede from the sun , a limit must be reached , when the faintest beams will be of equal brightness with the illuminated air : then , and only then , will they fail ...
Page 28
... plate we may expect a minimum of difficulties : but how seldom in out - door photography will an exact exposure be obtained ! In photographing a bright object , the difference of a second of time may either under or over - expose a plate ...
... plate we may expect a minimum of difficulties : but how seldom in out - door photography will an exact exposure be obtained ! In photographing a bright object , the difference of a second of time may either under or over - expose a plate ...
Page 29
... plates , such as a Seed's 26 are unfit for such work ; I should rather use a Seed's 23 , with a very small stop and a quick shutter ; or , still better , a Vogel's Orthochromatic plate . corona . Another point of vital importance to be ...
... plates , such as a Seed's 26 are unfit for such work ; I should rather use a Seed's 23 , with a very small stop and a quick shutter ; or , still better , a Vogel's Orthochromatic plate . corona . Another point of vital importance to be ...
Page 30
... plates used were Seed's 26 ; time one - fourth of a second . In developing plate no . I , I used a cold pyrogallic solution . Result — an under - timed plate ; no details . The second plate was developed with a normal solution of ...
... plates used were Seed's 26 ; time one - fourth of a second . In developing plate no . I , I used a cold pyrogallic solution . Result — an under - timed plate ; no details . The second plate was developed with a normal solution of ...
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Common terms and phrases
angle aperture appears Astronomical Astronomical Society atmosphere August axis bright BURCKHALTER California Street Catalogue Chicago Section chronometer Comet Committee copies corona coronal pole crater dark diameter Directors disc distance drawings E. E. BARNARD eclipse elected elongated equator equatorial exposure eye-piece HOLDEN inches instrument J. M. SCHAEBERLE July Jupiter Jupiter's KEELER latitude Library Lick Observatory light limb London longitude lunar magnitude means meeting meridian meridian circle meteors minutes Miss CLERKE MOLERA Moon Mount Hamilton nebula negatives object observations obtained Pacific parallax Paris photographic PIERSON planet plates polar position present Prof Professor WEINEK proper motions Publications radiant rays reference book right ascension ring San Francisco satellite SCHMIDT Secretary seen shadow solar spectra spectrum spot stars stellar sun-spots sun's telescope temperature tion TRANSIT OF MERCURY U. S. Naval Observatory University visible W. H. S. MONCK W. W. CAMPBELL Washington Zodiacal light