TABLE OF CONTENTS. 



General Results of the Makerstoun Observations — 



System of Observation in different years, 



Magnetic Declination — 



Mean Declination and Secular Change, 



Annual Variations — 



Mean Declination, 



Difference of Daily Means from the Monthly Means, 



Diurnal Ranges, 



Ranges of the Monthly Mean Diurnal Variation, 



Effect of Disturbance on the Range of the Diurnal Variation, 



Mean Difference of an Observation from the Monthly Mean, 



Number of Positive Differences, 



Probable Error of an Observation from the Monthly Mean, 



Monthly Variations — 



Mean Declination, 



Diurnal Ranges, 



Mean Difference of an Observation from the Monthly Mean, 



Diurnal Variations — 



Method of combining Results for Different Years, 



Results from all the Observations, for each Month, 



Results from all the Observations, for Groups of Months, 



Results from Undisturbed Days, for Groups of Months, 



Effect of Disturbance on the Mean for a Month and for the Year, 



Effect of Disturbance on the Mean for each Hour, 



Frequency of the Positive and Negative Excursions from the Hourly Mean 



Position, 



Sums of Disturbances from the Hourly Mean Position, 



Mean Excursions of the Magnet from the Monthly Mean Position for each 



Hour, 



Probable Error of an Observation from the Monthly Mean, 



Variations with reference to the Moon's Hour- Angle, 



NO. 



7 



xii 



11 



xiv 



12 



XV 



13 



xvi 



15 



xvi 



16 



xvii 



17 



xviii 



20 



xviii 



21 



xix 



22 



xix 



24 



xix 



26 



XX 



28 



xxi 



32 



xxii 



36 



xxiii 



38 



xxiv 



39 



xxiv 



40 



XXV 



42 



xxvi 



43 



xxvii 



46 



xxviii 



47 



xxix 



