National Geographic : 1924 Oct
FACTS ABOUT A FAMOUS FAMILY Day and Night in Dayton DAY AND NIGHT automobiles are being driven until they are worn out by the General Motors Research Laboratories, at Dayton, Ohio. Throughout the long steady grind, materials and designs are analyzed; performance, wear and repairs are tabulated. Thus are discovered facts which point the way to the further improvement of General Motors cars and accessoryproducts. The Research Laboratories, the largest of their kind, are made possible by the fact that General Motors is a family of many com panies-all of which are served by the parent organization. GENERAL MOTORS BUICK ' CADILLAC ' CHEVROLET " OAKLAND OLDSMOBILE ' GMC TRUCKS General Motors cars, trucks and Delco-Light products may be purchased on the GMAC Payment Plan. Insurance service furnished by General Exchange Corporation.