NOTES AND OBSERVATIONS SUN PILLAR. Miss Abbey of South wold writes : " Just after 5 p.m., on February 23rd, there were two suns, very clear and distinct and bright-shining one above the other and apparently touching. A thin wisp of cloud lay across the middle, where they seemed to touch. I watched this stränge sight from two westward-looking rooms. It lasted for several minutes from the time I first saw it."
HALOS. This note was sent to Mr. R. R. Wilson for his observations. He writes : " Very few of us have not at some time seen a halo round the sun (or moon) often called a ' burr ' in rural districts. This is only one manifestation of what can occur and can sometimes be seen. Some halo phenomena are very complex. We may see a mock sun (or moon) or a sun (or moon) pillar. Lunar optical phenomena are naturally less often observed. There are ' arcs of contact' to halos, sometimes brightly coloured. All these phenomena require that ice crystals are present in the atmosphere. These are usually in the form of cirrus or cirrostratus clouds. The most common halo is that of 22°. It is also