“The true Mathematical and Mechanical Form of all manner of Arches for building with the true abutment necessary to each of them, a Problem which no Architectonick Writer hath ever yet attempted, much less perform'd. ...Ut pendet continaum flexile, sic stabit contiguum rigidum, which is the Linea Cat…”— Robert Hooke, amazon.comTagged: Mathematical, Mechanical, Form, Arches, Building