...reflections.

For this short course I am omitting here many interesting examples of multiple reflections shown in my 1992 book, PVI.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...data

I'd like to thank Alistair Harding for this interesting data set named April 18.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.