practice. According to the English law, when double costs are given by the statute, the term is not to be understood, according to its literal import, twice the amount of single costs, but in such case the costs are thus calculated. 1. the common costs; and, 2. Half of the common costs. Bac. Ab. Costs, E; 2 Str. 1048. This is not the rule in New York, nor in Pennsylvania. 2 Dunl. Pr. 731; 2 Rawle’s R. 201. 2. In all cases where double or treble costs are claimed, the party must apply to the court for them before he can proceed to the taxation, otherwise the proceeding will be set aside as irregular.