[19] Observations of the food eaten by individuals or groups of people are also called dietary studies, whether the observed dietary is such as to satisfy the food requirement or not.
[20] One quart of milk yields 63⁄4 portions.
[21] Rose, “Laboratory Handbook for Dietetics.”
[22] The apportionment of the income to the different expenses of living (food, clothing, shelter, etc.) is discussed in Chapter XIX. It will be found that the smaller the income the higher is the percentage of it which must be allowed for food.
[23] Printed by permission of J. Wiley & Sons, publishers of “The Cost of Living,” by Ellen Richards.
[24] Published by J. Wiley & Sons, publishers of “The Cost of Living,” by Ellen Richards.
[25] From Chapin’s “Standards of Living.” By permission Russell Sage Foundation.
[26] Some of the widely advertised disinfectants are rather ineffective. Those interested should look up the tests of commercial disinfectants published from time to time by the United States Public Health Service.
[27] Depending upon the nature of the infection, it may be possible to substitute the use of a proper disinfectant, followed by short boiling.