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
Pure Food Building livestock, was "less imaginative architecturally." "The Globe" suggested the building demonstrated the "growing popularity of the segregation principle," referring to the grouping of exhibits by theme. An exhibitor at the Electrical Building noted a rise in visitors, crediting it to the fact their building was located en route to both Pure Food and the Coliseum, when entering through the Dufferin Gates. Textile manufacturers were announced in March 1922 to be considering their own structure. As of April 1922, the CNE noted that all of the Pure Food Building space was allotted, and 25 late applicants had been denied. (Despite around