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the true meridian is lcfs than the angle of the magneticvariation of the meridian to which the bearing is to bereduced, the bearing of the objedt with that meridianwill be north 15 0 eaft : Or if the bearing of the objedt isfouth 2° weft with a meridian having io° of weft varia-tion, which is to be reduced to its bearing with a meri-dian having 23 0 of weft variation, the object will forman angle of io° — 2° = 8° with the true meridian (feep. 122); then (by the rule) 23 0 — 8° = 15 0 ; thereforethe bearing of the object with that meridian will be fouth15 0 weft (fee 6th fuppofition, p. 134).

To reduce a bearing taken by a magnetic meridian of a givenvariation to its bearing with another of a different varia-tion, ’when the magnetic variation of the meridian to ivhichthe bearing is to be reduced and the bearing of the object•with the true meridian are on contrary fules thereof

Rule II. — To the angle that the bearing forms withthe true meridian add the angle that the variation of themeridian to which the bearing is to be reduced, and thefuni will be the angle that the bearing will make withthat magnetic meridian ; which bearing will be on thecontrary fide of that magnetic meridian that its variationis on with the true meridian. Thus, if the bearing ofany object is north 25 0 eaft with a meridian having io°of weft variation, which is to be reduced to its bearingwith a meridian having 23 0 of weft variation, the objectwill form an angle with the true meridian of 25 0 — io°= 15 0 (fee p. 122); then (by the rule) 15° + 23 0 =38° ; and as the bearing of the object is on the contrary

fide