#27. The Multiplication of Services.# A great deal of labour is often saved by arranging work so that a labourer may serve many persons as easily as one. If a messenger is going to carry a letter to the post-office, he can as readily carry a score. Instead of twenty people each carrying their own letters, one messenger can do the whole work without more trouble. This explains why the post-office is able to forward a letter from any part of the kingdom to any other part for a penny or even a halfpenny. There are so many people sending and receiving letters, that a postman usually carries a great many, and often delivers half-a-dozen at once. But it would be quite impossible to send telegrams so cheaply, because every message has to be separately telegraphed along the wires, and then delivered at once by a special messenger, who can seldom carry more than one message at a time. Archbishop Whately pointed out that when a party of travellers exploring a new country camp out at night, they naturally divide the work: one attends to the horses, another unpacks the stores, a third makes a fire and cooks the supper, a fourth goes for water, and so on. It would be quite absurd if a dozen travellers in one party were to light a dozen separate fires, and cook a dozen separate meals. The labour of lighting a fire and cooking for twelve persons is not much greater than doing the same for one or two. There are many things which, if once done, will serve for thousands or millions of people. If a person gets important information, as, for instance, that a storm is coming across the Atlantic Ocean, he can warn a whole nation by means of the newspapers. It is a great benefit to have a meteorological office in London, where two or three men spend their labour in learning the weather all over the country by means of the telegraph, and thus enable us to judge, as far as possible, of the weather which is coming. This is a good case of the #multiplication of services#.