DIY History | Transcribe | Scholarship at Iowa | Theory of the astronomical transit instrument applied to the portable transit instrument Wuerdemann no.26: a compilation from various authorities, with original observations by Harry Edward Burton, 1903 | Theory of the astronomical transit instrument applied to the portable transit instrument Wuerdemann no. 26: a compilation from various authorities, with original observations by Harry Edward Burton, 1903, Page 46

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Theory of the astronomical transit instrument applied to the portable transit instrument Wuerdemann no.26: a compilation from various authorities, with original observations by Harry Edward Burton, 1903

Theory of the astronomical transit instrument applied to the portable transit instrument Wuerdemann no. 26: a compilation from various authorities, with original observations by Harry Edward Burton, 1903, Page 46

Methods of Observation.
   There are two methods of observing transits, the chronograhic method and the "eye and ear" method. The chronograph is an instrument for graphically measuring or recordingn intervals of time and the process of observing with the chronograph consists in waiting, key in hand, until the instant when the star is apparently bisected by the wire and then pressing the key as soon as possible the clock, chronograph, and key being in an electric circuit.
   "Before using the "eye and ear" method the observer must first learn to pick up the beat of the clock and carry it even while paying attention to other matters. To pick up the beat, first look at some second's mark two or more seconds ahead of the second hand. Fix the name of that second in mind as it is approached by the second hand. Name it with the tick at which the second hand reaches it. Then, keeping the

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Methods of Observation. There are two methods of observing transits, the chronograhic method and the "eye and ear" method. The chronograph is an instrument for graphically measuring or recordingn intervals of time and the process of observing with the chronograph consists in waiting, key in hand, until the instant when the star is apparently bisected by the wire and then pressing the key as soon as possible the clock, chronograph, and key being in an electric circuit. "Before using the "eye and ear" method the observer must first learn to pick up the beat of the clock and carry it even while paying attention to other matters. To pick up the beat, first look at some second's mark two or more seconds ahead of the second hand. Fix the name of that second in mind as it is approached by the second hand. Name it with the tick at which the second hand reaches it. Then, keeping the