cheapest articles of diet, and should be much more extensively used.
The following table, compiled by specialists of the U. S. Department of Agriculture, shows the quantities of various foods needed to supply as much protein or energy as 1 quart of milk:
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| Protein | Energy |
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| 1 quart of milk is equal to— | 1 quart of milk is equal to— |
| 7 ounces of sirloin steak | 11.3 ounces of sirloin steak |
| 6 ounces of round steak | 14.9 ounces of round steak |
| 4.3 eggs | 9 eggs |
| 8.6 ounces of fowl | 14.5 ounces of fowl |
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Another method of comparison is shown by the table below, in which the relative value of certain foods as economical sources of protein is given:
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| Milk at— | Is as cheap as sirloin | Or eggs at— |
| | steak at— | |
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| 7 cents a quart | 16.3 cents a pound | 17.6 cents a dozen |
| 8 cents a quart | 18.6 cents a pound | 20.1 cents a dozen |
| 9 cents a quart | 21.0 cents a pound | 22.6 cents a dozen |
| 10 cents a quart | 23.3 cents a pound | 25.1 cents a dozen |
| 12 cents a quart | 27.9 cents a pound | 30.2 cents a dozen |
| 15 cents a quart | 34.9 cents a pound | 37.7 cents a dozen |
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According to this table, if milk is selling at 10 cents a quart, sirloin steak must sell as low as 23.3 cents a pound, and eggs at 25.1 cents a dozen to supply protein at equal cost.
