But neither does this seem to be a strictly correct representation. I am not sure that I can think of gold without thinking of yellowness, but I am positive that I can without thinking of hardness. Nor is there any doubt that the youngest child knows perfectly well what it means when, trying to lift a stone, it calls the stone heavy, although it might not be more difficult to make the stone itself than the child understand what is meant by muscular contractility. I own that if it be here demanded of me how a compound can be present unless every one of its components be present also, I may under pressure be constrained to suggest that possibly, after all, the very term _compound_ or _complex idea_ may be somewhat of a misnomer, or at any rate that the constituents of such an idea are much fewer than is commonly supposed. Be it admitted that the idea, so styled, could not have been formed without the instrumentality of other and previously-formed ideas, still it does not follow that the instruments of production should for ever after accompany the product. The rackful of dry toast which is brought to you for breakfast could scarcely have been so neatly sliced without the help of a knife, but the toast is not the less in bodily presence on the breakfast-table because the knife that cut it has been left behind in the kitchen. Neither, although you may probably be aware that salt, suet, sugar, and spice enter into the composition of a Christmas pudding, do you necessarily think of those separate ingredients when you think of the pudding, any more than you would see them separately if you saw the pudding. The only qualities which you apparently cannot help thinking of when you think of the pudding are its size, shape, and colour.