Adventures in Africa under the British, Belgian, and Portuguese flags, with map, diagrams, index and glossary . GRAPHIC CONSTRUCTIOIf OF SUNDIAL. (i) From A, on line BA, I erect the latitude ofplace BAQ, the line AO being about one-quarterof the length of the line AB. (2) From O I drop a perpendicular OC on tothe hne AB. (3) I make an angle COE equal to the angleBAQ (the latitude of place). (4) E being the point where the line OE cutsAB. (5) With centre E and radius EO I cut theline AB at N. (6) From N I erect a perpendicular NS atright angles to my line AB. (7) With centre N I describe the qu
Adventures in Africa under the British, Belgian, and Portuguese flags, with map, diagrams, index and glossary . GRAPHIC CONSTRUCTIOIf OF SUNDIAL. (i) From A, on line BA, I erect the latitude ofplace BAQ, the line AO being about one-quarterof the length of the line AB. (2) From O I drop a perpendicular OC on tothe hne AB. (3) I make an angle COE equal to the angleBAQ (the latitude of place). (4) E being the point where the line OE cutsAB. (5) With centre E and radius EO I cut theline AB at N. (6) From N I erect a perpendicular NS atright angles to my line AB. (7) With centre N I describe the quadrant ES. (8) I divide the quadrant ES into six equalparts. {9) Through E I draw a line parallel to mydiameter DD^ to cut the semicircle in Y. (10) From N I draw lines through the fivemarks on my quadrants ES to cut the line EYin five places, (11) I join A to each of these five places andproduce these lines to cut the semicircle in. SUNDIALS 163 (12) I then number my point B XII and myfive points on the semicircle I, II, III, IV, V,or XI, X, IX, VIII, VII, according as I havedone my graphic calculations o
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1915
