1906 — This year was full of chiropractic news:

• Drs. D. D. and B. J. Palmer organize the Universal Chiropractors’ Association, which is later renamed the International Chiropractors Association.
• Drs. D. D. and B. J. Palmer publish their first book, “The Science of Chiropractic.”
• Modernized Chiropractic, chiropractic’s first textbook, is published by Solon Langworthy, Oakley Smith, and Minora Paxson, three early disciples of D. D. who had severed ties with Davenport and launched the rival American School of Chiropractic and Nature Cure in Cedar Rapids, Iowa.
• D. D. Palmer is found guilty of practicing medicine without a license and serves 23 days in Scott County, Iowa, jail. B. J. Palmer takes up position of principle of Palmer School because of his father’s imprisonment.
• Former PSC faculty member John Fitzalan Howard, DC, starts the National School of Chiropractic in Davenport, Iowa.
• M. M. Stone, DC, founds the Texas College of Chiropractic in San Antonio, Texas.