. The principles of projective geometry applied to the straight line and conic . Involutions 337 on the conic. Similarly points B and C may be constructed. The Iequired conicis the conic through A, B, C, A, B, (2) To describe a conic through a given point to determine given involutions ontwo given lines.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgeometryprojective