AstronomyDetermination of time, longitude, latitude, and azimuth . WASHINGTON GOVERNMENT PRINTING OFFICE 1913 •WJS : j o as v 201 US CONTENTS. Page. Introduction 5 PART I.—DETERMINATION OF TIME. General remarks . 7 Transit instrument 7 Transit micrometer f 8 Chronograph 11 Theory of the transit instrument 13 Adjustments of the transit instrument 14 Transit observations - 17 Computation of transit observations: Usual method of computing time set 20 Second method of computing time set 28 Least square method of computing time set when azimuth stars are observed 39 Complete least square method of
AstronomyDetermination of time, longitude, latitude, and azimuth . WASHINGTON GOVERNMENT PRINTING OFFICE 1913 •WJS : j o as v 201 US CONTENTS. Page. Introduction 5 PART I.—DETERMINATION OF TIME. General remarks . 7 Transit instrument 7 Transit micrometer f 8 Chronograph 11 Theory of the transit instrument 13 Adjustments of the transit instrument 14 Transit observations - 17 Computation of transit observations: Usual method of computing time set 20 Second method of computing time set 28 Least square method of computing time set when azimuth stars are observed 39 Complete least square method of computing time set 41 Determination of instrumental constants 43 Discussion of errors 48 Other methods of determining time 51 The vertical circle 52 Star factors 60 PART II.—THE DETERMINATION OF THE DIFFERENCE OF LONGITUDE OF TWO STATIONS. Introductory 78 Program and apparatus of the telegraphic method 79 Computation of difference of longitude when transit micrometer is used 84 Discussion of errors, transit micrometer method 85 Program where no transit mic
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