THREE:From a little way off came the sound of rapid footsteps. The step grew swifter, and there was the sound of another behind. As if by magic a half score of people seemed to spring from under the trees against the square yonder.In making notes, as much as possible of what is written should be condensed into brief formul?, a form of expression which is fast becoming the written language of machine shops. Reading formul? is in a great degree a matter of habit, like studying mechanical drawings; that which at the beginning is a maze of complexity, after a time becomes intelligible and clear at a glance.