What subject do principles 15-30 pertain to?

The principles numbered 15-30 in the context of Palmer Chiropractic Philosophy primarily relate to biological principles. These principles delve into the understanding of living organisms and their functions, which is foundational in chiropractic care. The focus here is on how the human body, as a biological entity, responds to various forms of stress and the implications for health and disease, emphasizing the vitalistic view of the relationship between the spine, nervous system, and overall health.

These biological principles are crucial for chiropractors as they inform not only the approach to treatment but also the underlying theories about life and health. In the context of chiropractic education and practice, understanding these principles allows practitioners to effectively assess and respond to the delicate interplay of bodily functions and the impact of spinal alignment on overall well-being.