The skill of a productive labourer is analogous to the machinery he works with: neither of them is enjoyment, nor conduces directly to it, but both conduce indirectly to it, and both in the same way. If a spinning-jenny be wealth, the spinner's skill is also wealth. If the mechanic who made the spinning-jenny laboured productively, the spinner also laboured productively when he was learning his trade: and what they both consumed was consumed productively, that is to say, its consumption did not tend to diminish, but to increase the sum of the permanent sources of enjoyment in the country, by effecting a new creation of those sources, more than equal to the amount of the consumption. The skill of a tailor, and the implements he employs, contribute in the same way to the convenience of him who wears the coat, namely, a remote way: it is the coat itself which contributes immediately. The skill of Madame Pasta, and the building and decorations which aid the effect of her performance, contribute in the same way to the enjoyment of the audience, namely, an immediate way, without any intermediate instrumentality. The building and decorations are consumed unproductively, and Madame Pasta labours and consumes unproductively; for the building is used and worn out, and Madame Pasta performs, immediately for the spectators' enjoyment, and without leaving, as a consequence of the performance, any permanent result possessing exchangeable value: consequently the epithet unproductive must be equally applied to the gradual wearing out of the bricks and mortar, the nightly consumption of the more perishable "properties" of the theatre, the labour of Madame Pasta in acting, and of the orchestra in playing. But notwithstanding this, the architect who built the theatre was a productive labourer; so were the producers of the perishable articles; so were those who constructed the musical instruments; and so, we must be permitted to add, were those who instructed the musicians, and all persons who, by the instructions which they may have given to Madame Pasta, contributed to the formation of her talent. All these persons contributed to the enjoyment of the audience in the same way, and that a remote way, viz., by the production of a _permanent source of enjoyment_. The difference between this case, and the case of the cotton spinner already adverted to, is this. The spinning-jenny, and the skill of the cotton spinner, are not only the result of productive labour, but are themselves productively consumed. The musical instrument and the skill of the musician are equally the result of productive labour, but are themselves unproductively consumed. Let us now consider what kinds of labour, and of consumption or expenditure, will be classed as productive, and what as unproductive, according to this rule. The following are always productive: