Publications of the Astronomical Society of the Pacific, Volumes 3-4Astronomical Society of the Pacific, 1891 |
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Page 18
... axis of the dusky ring ( outer ellipse . ) It is not so well seen on the east side . It divides Ring A into two parts as 2 to 3. [ It is , therefore , of the way from the outer ellipse of Ring A towards the inner one . ] The south- ern ...
... axis of the dusky ring ( outer ellipse . ) It is not so well seen on the east side . It divides Ring A into two parts as 2 to 3. [ It is , therefore , of the way from the outer ellipse of Ring A towards the inner one . ] The south- ern ...
Page 22
... axis of the telescope ; to the eye - piece is attached a micrometer , capable of being turned one- quarter around , in order that , with the second level , the instrument may be used as a zenith telescope , as well as a transit ...
... axis of the telescope ; to the eye - piece is attached a micrometer , capable of being turned one- quarter around , in order that , with the second level , the instrument may be used as a zenith telescope , as well as a transit ...
Page 26
... axes of the wires , in cms . , and r is the radius of the wires in cms . In this case c is 2.9 amperes , or 0.29 units , d is 0.5 and r is 0.0033 . Whence f is 0.84 dyne , equivalent to 0.86 milligramme weight , or of the same order as ...
... axes of the wires , in cms . , and r is the radius of the wires in cms . In this case c is 2.9 amperes , or 0.29 units , d is 0.5 and r is 0.0033 . Whence f is 0.84 dyne , equivalent to 0.86 milligramme weight , or of the same order as ...
Page 31
... axis , by means of a tangent screw , in order to set it exactly parallel with the lines of the grating . The ... axes , and , when in use , the face of the grating is at right angles to the girder . With the long focus grating ...
... axis , by means of a tangent screw , in order to set it exactly parallel with the lines of the grating . The ... axes , and , when in use , the face of the grating is at right angles to the girder . With the long focus grating ...
Page 33
... axis coming at the center of their combined lengths . This will give great rigidity , and render necessary very little weighting at the object- glass . The tower for the dome is two stories high , and has stairs leading directly to the ...
... axis coming at the center of their combined lengths . This will give great rigidity , and render necessary very little weighting at the object- glass . The tower for the dome is two stories high , and has stairs leading directly to the ...
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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