A Handbook of Descriptive Astronomy
A Handbook of Descriptive Astronomy
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The Reflex Zenith-Tube.
9. The Horizontal Floating Collimator. 10. The Vertical Floating Collimator.
CHAP. VI. ] Miscellaneous Astronomical Instruments. 695 ii 13.
The Heliometer. Airy's Orbit- Sweeper. The Comet- Seeker. 14. The Astronomical Spectroscope.
The Altazimuth*, as its name implies, is used for the measure- ment of altitudes and azimuths. It may be considered as a Fig. 251.
THE PORTABLE ALTAZIMUTH, OR TRANSIT THEODOLITE.
modification of the ordinary transit circle, the telescope, cir...cle, and stand of which are capable of motion round a vertical axis. The altazimuth may therefore be used for meridional or extra- meridional observations indifferently, and when of a portable size it may in fact be regarded as a theodolite of a superior construction.
* Pearson, Pract. Ast. , vol. Ii. Pp. 413, 457, 472 ; Heather, Mathematical In- struments, p. 153; Simms, Treatise on Instruments, p. 92 ; English Cyclopaedia, art. Astronomical Circle ; Loornis, Pract. Ast. , p. 93 ; Narrien, Ast.
What to read after A Handbook of Descriptive Astronomy?
You can find similar books in the "Read Also" column, or choose other free books by George F George Frederick Chambers to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The Reflex Zenith-Tube.
9. The Horizontal Floating Collimator. 10. The Vertical Floating Collimator.
CHAP. VI. ] Miscellaneous Astronomical Instruments. 695 ii 13.
The Heliometer. Airy's Orbit- Sweeper. The Comet- Seeker. 14. The Astronomical Spectroscope.
The Altazimuth*, as its name implies, is used for the measure- ment of altitudes and azimuths. It may be considered as a Fig. 251.
THE PORTABLE ALTAZIMUTH, OR TRANSIT THEODOLITE.
modification of the ordinary transit circle, the telescope, cir...cle, and stand of which are capable of motion round a vertical axis. The altazimuth may therefore be used for meridional or extra- meridional observations indifferently, and when of a portable size it may in fact be regarded as a theodolite of a superior construction.
* Pearson, Pract. Ast. , vol. Ii. Pp. 413, 457, 472 ; Heather, Mathematical In- struments, p. 153; Simms, Treatise on Instruments, p. 92 ; English Cyclopaedia, art. Astronomical Circle ; Loornis, Pract. Ast. , p. 93 ; Narrien, Ast.
What to read after A Handbook of Descriptive Astronomy?
You can find similar books in the "Read Also" column, or choose other free books by George F George Frederick Chambers to read onlineMoreLess
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