This would mean that a bodily condition translates to a noticeable change in the appearance of the iris, but this has been disproven through many studies. (See section on Scientific research.) For example, "acute inflammatory", "chronic inflammatory" and "catarrhal" signs may indicate involvement, maintenance, or healing of corresponding distant tissues, respectively. Other features that iridologists look for are "contraction rings" and "Klumpenzellen", which may indicate various other health conditions, as interpreted in context. The first "explicit" description of iridological principles such as homolaterality (without using the word "iridology") are found in "Chiromatica Medica", a famous work published in 1665 and reprinted in 1670 and 1691 by Philippus Meyeus (Philip Meyen von Coburg). The first use of the word "Augendiagnostik" ("eye diagnosis", loosely translated as "iridology") began with Ignaz von Peczely, a 19th-century Hungarian physician who is recognised as its founding father. The most common story is that he got the idea for this diagnostic tool after seeing similar streaks in the eyes of a man he was treating for a broken leg and the eyes of an owl whose leg von Peczely had broken many years before. At the First International Iridological Congress, Ignaz von Peczely's nephew, August von Peczely, dismissed this myth as apocryphal, and maintained that such claims were irreproducible. The second 'father' to iridology is thought to be Nils Liljequist from Sweden, who greatly suffered from the outgrowth of his lymph nodes. After a round of medication made from iodine and quinine, he observed many differences in the colour of his iris. This observation inspired him to create and publish an atlas in 1893, which contained 258 black and white illustrations and 12 colour illustrations of the iris, known as the Diagnosis of the Eye. The German contribution in the field of natural healing is due to a minister Pastor Emanuel Felke, who developed a form of homeopathy for treating specific illnesses and described new "iris signs" in the early 1900s. However, Pastor Felke was subject to long and bitter litigation. The Felke Institute in Gerlingen, Germany, was established as a leading center of iridological research and training. Iridology became better known in the United States in the 1950s, when Bernard Jensen, an American chiropractor, began giving classes in his own method.