Sentence:  As Mr. Giffen has pointed out, a rise in the price of bread makes so large a drain on the resources of the poorer labouring families and raises so much the marginal utility of money to them, that they are forced to curtail their consumption of meat and the more expensive <WSD>farinaceous</WSD> foods: and, bread being still the cheapest food which they can get and will take, they consume more, and not less of it ... 
Meaning of the word marked with <WSD> tags:  Made from, or rich in, starch or flour.