Bread contains eighty nutritious parts in 100; meal thirty-four in 100; French beans, ninety-two in 100; common beans, eighty-nine in 100; peas, ninety-three in 100; lentils, ninety-four in 100; cabbages and turnips, the most aqueous of all the vegetables compared, produce only eight pounds of solid matter in 100 pounds; carrots and spinach produce fourteen in the same quantity; while one hundred pounds of potatoes contain twenty-five pounds of dry substance. From a general estimate it results, that one pound of good bread is equal to two pounds and a half or three pounds of otatoes; that seventy-five pounds of read and thirty of meat may be substituted for 300 pounds of potatoes. The other substances bear the following proportions: four parts of cabbage to one of potatoes; three parts of turnips to one of potatoes; two parts of carrots and spinach to one of potatoes; and about three parts and a half of potatoes to one of rice, lentils, beans, French beans, and dry peas.