1. Refraction in the principal meridians of a triaxial ellipsoid: with remarks on the correction of astigmatism by cylindrical glasses, and an historical note on corneal astigmatism Author(s): Burnett, Swan M. (Swan Moses), 1847-1906, author Publication: [New York?] : [publisher not identified], [1883?] Subject(s): Refraction, OcularAstigmatism -- therapy