Experiments made to determine the temperature co-efficients of Watson's magnetographs . -12v L-lOy 9 _L 10 12 k e -«.—— \., **• 13 14 _1_ 15 I if hrs Time Scale. II. 20tli Jan. 02. 03 I d IDO (D -3a m S - (D H -30° <-20 a H lu-s 7 L o p^.^ -12y-lOy 8 9 10. 16 krs III 31st Jan. 02. %. ? -55° y ^. / / Xb / ! / x cr» III. 31st Jan. 02. /\ -55° I, O a H V-^-c-- y •B / r-y /- y

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectgeomagnetism, bookyea