12. Obtain price lists and estimate the cost of simple but sufficient laundry equipment.
13. Obtain a laundry list from a commercial laundry. Make a list of the articles washed at home, and compare cost with the cost of putting out clothes, estimating fuel, cleansers, labor, and some wear and tear of apparatus.
APPENDIX
CLASSIFICATION OF FOODSTUFFS
Elements required by the body
| Carbon |
| Hydrogen |
| Oxygen |
| Nitrogen |
| Sulphur |
| Phosphorus |
| Iron |
| Calcium |
| Magnesium |
| Potassium |
| Sodium |
| Chlorine |
| Iodine (traces) |
| Fluorine (traces) |
| Silicon (traces) |
Foodstuffs furnishing these elements
| Proteins—furnish carbon, hydrogen, oxygen, nitrogen, sulphur, and sometimes phosphorus and iron |
| Fats—furnish carbon, hydrogen, and oxygen |
| Carbohydrates—furnish carbon, hydrogen, and oxygen |
| Mineral matter—furnishes phosphorus, iron, calcium, magnesium, sodium, potassium, chlorine, iodine, fluorine |
| Water—furnishes hydrogen and oxygen |