FROM ORDINARY DAYS OF THE ELEVEN YEARS 1890 TO 1900. 
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now of the National Physical Laboratory, and Mr. B. Francis, the present magnetic 
observer at Kew Observatory. During the eleven years whose records are mainly 
considered the magnetographs were under the charge of Mr. T. W. Baker, then 
Chief Assistant, who also took the great majority of the absolute observations. The 
homogeneousness of the material owes much to Mr. Baker. The expense of 
measuring the curves was defrayed mainly out of grants from the Government Grant 
Committee. The calculation of the diurnal inequalities, Fourier coefficients, and 
other arithmetical work has been mainly done in my leisure hours. 
