1930 — The National Chiropractic Association is formed through the merger of the American Chiropractic Association (the third ACA, founded by N. C. Ross) and the Universal Chiropractors’ Association (UCA).

Dissension within the UCA over B. J. Palmer’s continual attempts to control chiropractic, particularly with the neurocalometer, precipitated the creation of the NCA.

In 1963 the NCA reorganized by merging with several smaller groups and formed the current ACA.

REFERENCES

• Moore, J. Stuart. Chiropractic in America: The History of a Medical Alternative, Johns Hopkins University Press, 1993.

• Peterson, Dennis and Wiese, Glenda. Chiropractic: An Illustrated History, Mosby, 1995.