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23 0 of weft variation, the bearing of A with the truemeridian will be north 23 0 + io° = 33 0 weft ; for an-gle acA is equal to 33which is the angle, that cAmakes with the true meridian ScN.

3d.—Suppofe again the bearing of the object C withthe true meridian is required ; the bearing of C with themagnetic meridian will be equal to the angle ncC, whichcall north 53 0 eaft ; but the variation of the needle being23 0 to the weft of true north, and ought to have flood inthe direction of ab, confequently the bearing of C fromc with the true meridian will be north 55 0 — 23 0 =30° eaft ; for angle acC is equal to 30°, which is the an-gle that the line cC makes with the true meridian lineScN.

4th.—Suppofe the bearing of the objeft D with thetrue meridian is required ; the bearing of D with thefouth magnetic meridian will be equal to the angle scD,which call fouth 56° weft ; but the fouth end of theneedle having 23 0 of eaft variation, and ought to haveflood in direction of ab the true meridian, confequentlythe bearing of D from c with the true meridian will befouth 36° — 23 0 = 33 0 weft ; for angle bcD is equal to33 0 , which is the angle that the line cD makes with thetrue meridian line NcS.

5th.—Suppofe again the bearing of the obje£l B withthe true meridian is required ; the bearing of B with themagnetic meridian will be equal to the angle scB, whichcall fouth 15 0 eaft ; but the fouth end of the needle hav-ing 23° of eaft variation, confequently the true bearingof B-will be fouth 15 0 + 23 0 =; 38° eaft; for angle

bcB