(c) The _constancy_ or inconstancy of prospective employment in a given business, is a consideration that affects the Supply within it, and then the wages. If the services be of such a character, that they can only be carried on during nine months of the year, the wages of the renderers will be greater by the day or the month than they would be, provided the services were in order during all the twelve months. The laborer is apt to look at the aggregate earnings of the year, and will hardly take up a trade which affords employment but a part of the time, unless some compensation can be found in the higher wages for that time. This is the chief reason why the wages of the mason and house-painter, in this climate at least, are higher than those of the blacksmith and carpenter. The coachman, also, may stand by his horses half the day or night with no call for his services, and must have, therefore, a proportionably higher fare from those whom he does transport. In general, it is found that men prefer a constant rendering with a lower rate of pay, than an inconstant one with a prospect of larger wages for the particular jobs actually done; and because the many prefer that, those who take up with the other are able to secure a higher relative rate of pay in their less eligible vocation. It must be noticed, however, as counterworking this, that some men have desire for intervals of leisure in their business, and for opportunity to make these intervals subservient to some avocation or other means of livelihood.