INVESTIGATIONS in the THEORY of REFLECTED-RAY SURFACES, and their RELATION TO PLANE REFLECTED CAUSTICS. Also in the Appendix, a Theory of Plane Caustic Curves, identified with the Evolute of the Auxiliary Curve of Equiangular Intersection. By the Rev. G. F. Childe, M.A., Mathematical Professor in the South African College, Cape of Good Hope.
Cape Town: Published by J. C. Juta, Wale Street. 1858.
ON RELATED CAUSTICS of REFLECTION, and the EVOLUTE of the LEMNISCATA, as derived from a CAUSTIC of the Hyperbola. By the Rev. G. F. Childe, M.A.
Cape Town: Published by J. C. Juta, Wale Street. 1859.
SINGULAR PROPERTIES of the ELLIPSOID, and ASSOCIATED SURFACES of the NORTH DEGREE. Dedicated by permission to his Royal Highness Prince Alfred. By the Rev. G. F. Childe, M.A., author of “Ray Surfaces,” “Related Caustics,” &c., Mathematical Professor in the South African College, Member of the Board of Public Examiners at the Cape of Good Hope.
Macmillan & Co., Cambridge; J. C. Juta, Cape Town.