 When depositing or changing, the bags are weighed at the bank to check they contain the right amount.The contents of the clear bag are easy for the bank teller to check.Leonard Thompson (historian)

Leonard Monteath Thompson (born 6 March 1916, in Cranborne, Dorset, England - died June 2004) was Charles J. Stillé Professor of History Emeritus at Yale and director of the former Yale Southern African Research Program.