Canning novelty. Early methods of manufacture employed poisonous lead solder for sealing the cans. Studies in the 1980s attributed the lead from the cans as a factor in the disastrous outcome of the 1845 Franklin expedition to chart and navigate the Northwest Passage. Later studies found this to be false. Increasing mechanization of the canning process, coupled with a huge increase in urban populations across Europe, resulted in a rising demand for canned food. A number of inventions and improvements followed, and by the 1860s smaller machine-made steel cans were possible, and the time to cook food in sealed cans had
Val de Cans International Airport South Atlantic Ocean to Sierra Leone in West Africa. These facilities provided the necessary logistical support for the thousands of planes that, manufactured in Canada and the United States were moved to North Africa and Europe. After protracted negotiations between Brazil and the United States, airstrips were built at Belém for the Air Transport Command with two runways measuring 1,500 x 45 meters on a basis of concrete and asphalt and comprising modern airport facilities, able to meet efficiently civil aviation and military needs. Val de Cans and other air bases used by the Americans during World War II were