Sir William Fletcher Barrett (10 February, 1844 in Kingston, Jamaica – 26 May, 1925) was an English physicist and psychical researcher.
He was born in Jamaica where his father, William Garland Barrett, who was an amateur naturalist, Congregationalist minister and a member of the London Missionary Society, ran a station for saving the souls of emancipated African slaves. There he lived with his mother, Martha Barrett, née Fletcher, and his sister; the social reformer Rosa Mary Barrett. The family returned to their native England in Royston, Hertfordshire in 1848. In 1855 they moved to Manchester and Barrett was then educated at Old Trafford Grammar School.
Barrett then took chemistry and physics at the Royal College of Chemistry in London and then became the science master at the International College, London (1867–9) before becoming assistant to John Tyndall at the Royal Institution (1863-1866). He then taught at the Royal School of Naval Architecture.
In 1873 he became Professor of Experimental Physics at the Royal College of Science for Ireland. From the early 1880s he lived with his mother, sister, and two live-in servants in a residence at Kingstown (now Dún Laoghaire).
Barrett discovered Stalloy (otherwise known as Permaloy), a silicon-iron alloy used in electrical engineering and also did a lot of work on sensitive flames and their uses in acoustic demonstrations. During his studies of metals and their properties, Barrett worked with W. Brown and R. A. Hadfield. He also discovered the shortening of nickel through magnetization in 1882.
Barrett became interested in the paranormal in the 1860's after having an experience with mesmerism. Barrett believed that he had been witness to thought transference and by the 1870's he was investigating poltergeists. In September 1876 Barrett published a paper outlining the result of these investigations and by 1881 he had published preliminary accounts of his additional experiments with thought transference in the journal Nature. The publication caused controversy and in the wake of this Barrett decided to found a society of like-minded individuals to help further his research. To this aim he founded to Society for Psychical Research between January 5-6 1882.
Although he had founded the society, Barrett was only truly active for a year, and in 1884 founded the American Society of Psychical Research before his paranormal research diminished significantly. However, he became president of the society in 1904 and continued to submit articles to their journal, even with his diminished interest in the subject. in 1919 Barrett wrote the introduction to medium Hester Dowden's book Voices from the Void.
Barrett had a special interest in divining rods and in 1897 and 1900 he published two articles on the subject in Proceedings of the SPR, the society's magazine. After experimenting with dowsers Barrett concluded that the ideomotor response was responsible for the rod's movements.
When Barrett developed cataracts in his later years, he also began to study biology with a series of experiments designed to locate and successfully analyse causative agents within the eyes. The result of these experiments was a machine called the entoptiscope.
He was elected a Fellow of the Royal Society in June 1899 and was also a fellow of the Royal Society of Edinburgh and the Royal Dublin Society. He was knighted in 1912. He had married Dr Florence Willey in 1916. (wikipedia)
His work was referenced by Hughes in her book. See Light and Sound
Books
Light and Sound
On The Threshold of the Unseen, 1917
Psychical Research, 1920
Hughes
On colours developing by the same laws as musical harmonies
—The physical properties of light and darkness briefly considered
—If the laws are correctly gained, harmonics of tones and of colours will agree
—Quotation from a lecture by Professor W. F. Barrett on the order of sonorous and luminous wave-lengths
—Fountain of musical harmonics, E root of B; in colours yellow and ultra-violet, being tints and shades of white and black
—All harmonics of sound and colour condense into a primo springing from the fountain
—Multequivalency of tones and colours
—Wünsch's views nearly one hundred years ago
—Clerk Maxwell's, Lord Rayleigh's, and [Harmonies of Tones and Colours, Table of Contents1 - Harmonies]
The primitive laws of any science should be capable of succinct statement, but in combination with others they become more complex and delicate, and error is proved if in the developments they do not echo each other. If, therefore, musical harmonies are correctly gained, the same laws will develope harmonies of colour, and will agree with the colours of the rainbow, the circle of which is divided by the horizon. All who are interested in the laws which regulate these two sciences will doubtless know the interesting lectures delivered by W. F. Barrett (Professor of Experimental Physics in the Royal College of Science, Dublin), and the article written by him and published in the Quarterly Journal of Science, January, 1870, entitled "Light and Sound; an examination of their reputed analogy, showing the oneness of colour and music as a physical basis." I will quote shortly from the latter for the benefit of those who may not have met with it. "The question arises, Has all this æsthetic oneness of colour and music any physical foundation, over and above the general analogy we have so far traced between light and sound? We believe the following considerations will show, not only that it has some foundation, but that the analogy is far more wonderful than has hitherto been [Harmonies of Tones and Colours, On Colours as Developed by the same Laws as Musical Harmonies1, page 18]