It is very important to know the correct ratio of refuse part of the foodstuffs in order to determine the real amount of food intake. This paper is to report the results of study on the refuses in each stage of food consumption,and a schema was obtained after reconsideration about these stages. As it is observed in the schema,the ratio of the refuse of foodstuffs generally used is calculated from the equation,f+i/E,while in the case of village families,this should be f+i/B. In nutrition research,the intake of foods is ordinarily measured as E-(f+i)or E-(f+i+j),but the desirable amounts of nutritional intake generally used should be set up on the stage of I. (The meanings of the remarks t.i.j.E,Band I are cited in Table I.

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