Chromotherapy, sometimes called color therapy, colorology or cromatherapy, is an alternative medicine method that is considered pseudoscience and quackery. Chromotherapists claim to be able to use light in the form of color to balance "energy" lacking from a person's body, whether it be on physical, emotional, spiritual, or mental levels. For example, they thought that shining a colored light on a person would cure constipation. Color therapy is unrelated to photomedicine, such as phototherapy and blood irradiation therapy, which are scientifically accepted medical treatments for a number of conditions, as well as being unrelated to photobiology, which is the scientific study of the effects of light on living organisms. History Avicenna (980–1037), seeing color as of vital importance both in diagnosis and in treatment, discussed chromotherapy in The Canon of Medicine. He wrote that "color is an observable symptom of disease" and also developed a chart that related color to the temperature and physical condition of the body. His view was that red moved the blood, blue or white cooled it, and yellow reduced muscular pain and inflammation. American Civil War General Augustus Pleasonton (1801–1894) conducted his own experiments and in 1876 published his book The Influence Of The Blue Ray Of The Sunlight And Of The Blue Color Of The Sky about how the color blue can improve the growth of crops and livestock and can help heal diseases in humans. This led to modern chromotherapy, influencing scientist Dr. Seth Pancoast (1823–1889) and Edwin Dwight Babbitt (1828–1905) to conduct experiments and to publish, respectively, Blue and Red Light; or, Light and Its Rays as Medicine (1877) and The Principles of Light and Color. In 1933, Indian-born American-citizen scientist Dinshah P. Ghadiali (1873–1966) published The Spectro Chromemetry Encyclopaedia, a work on color therapy. Ghadiali claimed to have discovered why and how the different colored rays have various therapeutic effects on organisms. He believed that colors represent chemical potencies in higher octaves of vibration, and for each organism and system of the body there is a particular color that stimulates and another that inhibits the work of that organ or system. Ghadiali also thought that, by knowing the action of the different colors upon the different organs and systems of the body, one can apply the correct color that will tend to balance the action of any organ or system that has become abnormal in its function or condition. Dinshah P.