ARITHMETIC That science which is engaged in considering the properties and powers of numbers, and ,wich, from its manifest necessity in all the operations of weighing, numbering, and measuring, must have had its origin in the remotest ages of the world. In the lecture of the degree of Grand Master Architect, the application of this science to Freemasonry is made to consist in its reminding the Freemason that he is continually to add to his knowledge, never to subtract anything from the character of his neighbor, to multiply his benevolence to his fellow creatures, and to divide his means with a suffering Brother.