Mack Service Training School A four-day course covering the operation, maintenance and overhaul of the Waterous fire pump as installed on Mack fire apparatus will be presented at the Mack Service Training School, Allentown, Pa., during the weeks beginning July 27 and August 24. The school welcomes personnel of Mack Trucks, Mack distributors and operators of Mack equipment. There is no tuition fee, but students are required to pay their own travel, motel and living expenses. Application for attendance must be made through the nearest Mack branch, distributor or regional office and forwarded to: Service Training School, Mack Trucks, Inc., P. O. Box 1782, Allentown, Pa. 18105. If the class selected is already filled, the student will be assigned to the next open week. Classes are limited to 15 men.