A Handbook of Health

by Woods Hutchinson

[134] Diagram of the Air Tubes and Lungs

[137] "Improving their Wind"

[145] The "Dark Room" Danger of the Tenements

[146] Ventilating the Pupils, as well as the Classroom

[147] A Well-Aired Classroom

[148] A Healthful Arrangement of Windows and Shades

[151] A Healthful Bedroom

[152] Disease Germs

[153] A Vacuum Cleaner