The author emphasizes his discovery is physical, not based on the occult. Kilner's findings are based on years of patient experiment and considerable supporting evidence. The aura of healthy persons; etheric double; inner aura; optical problems; effects of the different forces upon the aura; complementary colors; outer aura in disease; inner aura in disease; use of the complementary colored bands in disease; aura during pregnancy. Also contains 64 illustrations.
Walter John Kilner came from a conventional medical family. His father and younger brother were also doctors.
He studied medicine at Cambridge University and St. Thomas's Hospital, London. He took his BA in 1870, his MRCS and LSA in 1871 and his MB in 1872.
From 1879 to about 1893 he was in charge of electro-therapy at St. Thomas's and wrote many papers.
He became a member of the Royal College of Physicians in 1883. He had a private practice at Ladbroke Grove, London, then a fashionable neighbourhood. In his spare time, he was a keen and brilliant chess player.