A. Introduction... . 
B. Declination .... 
The Needles 
TABLE OF CONTENTS. 
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C. Horizontal Intensity 
The Making of 
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the Observations 
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Determination of the Constants 
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Employment of the Observations for the Verification of the Constants. . 
The Final Values of the Temperature-Coefficient. ........... 
The Binal Values; of the’ Constants! and G54... -. 64.64 26 
The Observations and their Reduction 
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D. Inclination, .... 
E. Total Intensity .. 
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F. General Results. . 
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Plates I— XVII. Variations of Declination, 
