MAGNETIC OBSERVATIONS. 



183 



COEFFICIENTS OF THE DEVIATIONS OF THE AFTER RITCHIE COMPASS. 



COEFFICIENTS OF THE DEVIATIONS OF THE AFTER AZIMUTH COMPASS. 



COEFFICIENTS OF THE DEVIATIONS OF THE FORWVRD ALIDADE COMPASS. 



COEFFICIENTS OF THE DEVIATIONS OF THE FORWARD BINNACLE COMPASS. 



