TY  - JOUR
T1  - A Supplementary Memoir on Caustics
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 157
SP  - 7
EP  - 16
PY  - 1867/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1867.0002
M3  - doi:10.1098/rstl.1867.0002
AU  - Cayley, A.
ER  -