David's Woodturning. Turning Wood Into A Blue-tiful Resin Mirror. Posted: June 22, 2025 | Last updated: June 22, 2025. In this week’s video, I create a unique hybrid epoxy resin wall mirror ...

UNDER this title, W. Linnik, of the Leningrad Optical Institute, described in a recent issue of NATURE (April 20) an effect obtained with copper K radiation and a mica crystal. A narrow beam of X ...