CONTENTS. 
Page 
I.—Introduction, 4 : ; F ; ; : : A F ‘ , . sm wel 
II1.—Changes of Rate with a Change of the Place of the Chronometer—Land and Sea Rates, . 2 
IlIl.—Maenetic State of Steel Parts in the Work of a Chronometer, and Suggestions for the 
Removal of it, i : ; : : : : : c : 5 ¢ 5 8 
IV.—Magnetic Experiments by 8. Varley and G. Fisher—Criticism by P. Barlow, . j » 12 
V.—Experiments with Soft Iron by P. Barlow—General Considerations by P. Lecount, . ; 16 
VI.—General Considerations and Magnetic Experiments by W. Scoresby, : P ; ; 2 
VII.—Magnetic Experiments and General Discussions. by G. Harvey, : : : : . 24 
VIII.—Magnetic Experiments by Arnold and Dent, . : : : : : ; : . 82 
IX.—Observations of the Rates of a Chronometer in Different Azimuths by G. Fisher and 
5. G. Northcote, . i F F j : 4 ‘5 ‘ j ‘ : 4 B35) 
X.—Similar Observations by G. B. Airy, : 5 Aan G ; : : : So BS 
XI.—General Considerations and Magnetic Experiments by Ansart-Deusy, ; A : 5 BY) 
XI1.—Magnetic Experiments by Delamarche and Ploix, . 0 ; : : . : . 42 
XIII.—Suggestions, how to avoid the Magnetic Influence upon a Chronometer, by P. Barlow, 
W. Scoresby, and G. B. Airy, ¢ : : ‘ : % ; : : . 44 
XIV.—Arrangement of further Experiments, ; : : : ; ; : ; 3 2 AT 
Chronological List of Papers quoted, . c ¢ : 5 3 5 : 3 : cf 5 
