Notes on Nursing: What It Is and What It Is Not, an 1859 book by Florence Nightingale, provides hints on nursing to those entrusted with the health of others. Florence Nightingale stressed that it was not meant as a teach-yourself-nursing guide, but to assist in the practice of treating others. The book appeared at a time when the simple rules of health were only beginning to be known, when its subjects were of vital importance for the well-being and recovery of patients. It includes advice and practice for ventilation and warming, noise, environment, food, beds and bedding, light, and cleanliness.