Did American social and economic events from 1865 to 1898 influence D.D. Palmer the chiropractor and entrepreneur?

Peer-reviewed historical article on D.D. Palmer's early business practice, fetched directly from PMC (PMCID PMC3743648) 31 August 2026. Confirmed via PubMed (PMID 23997248): Journal of the Canadian Chiropractic Association, volume 57, issue 3, pages 221-232, 2013. Source for the financial-conflict facts used in this case: Palmer's Palmer School of Magnetic Cure charged $500 tuition for its first, two-student chiropractic course; his clinic operated as a 40-bed infirmary in downtown Davenport; his documented annual income grew from about $700 in 1887 to $9,276 by 1898 (equivalent to roughly $250,279 in 2012 dollars per the authors' own inflation adjustment); and his total advertising/promotional spend was, by his own account, under $150 for tens of thousands of circulars, cards, and brochures. Also documents a contemporary 1894 Davenport Leader article calling him a quack. Additionally states Palmer's office/clinic was located at the corner of Second and Brady Streets in Davenport, and that Harvey Lillard had been deaf for seventeen years before the September 1895 adjustment.