Explain the 13 canons of florence nightingale's theory?

Nightingale's Canons: Major Concepts

1. Ventilation
2. warming
3. Light,
4. Noise
5. Cleanliness of rooms/walls
6. Health of houses
7. Bed and bedding
8. Personal cleanliness
9. Variety
10. Chattering hopes and advices
11. Taking food. What food?
12. Petty management/
13. observation