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![Ayres: American Business Activity Since 1790. 1935. An original vintage colour print. 45" x 9". [BONDp57] Economic chart detailing American business activity from 1790 to 1935. Leonard Ayres, an economist and educator, began collecting economic statistics during the 1920s while working for the Cleveland Trust Co. His index, universally known as the Ayers Index, tracked economic conditions all the way back to 1790 and helped him gain a reputation for remarkably accurate opinions and predictions about the U.S. economy. The index is based on 10 indicators of economic health: pig iron consumption; railroad freight; cotton consumption; canal freight; coal production; railroad construction; blast furnace activity; rail production; locomotive production; and ship construction. A dashed line also tracks wholesale commodity prices.](https://i0.wp.com/prints.themaphouse.com/wp-content/uploads/2020/02/bondp57w.jpg?w=806&h=158&ssl=1)
Economic chart detailing American business activity from 1790 to 1935. Leonard Ayres, an economist and educator, began collecting economic statistics during the 1920s while working for the Cleveland Trust Co. His index, universally known as the Ayers Index, tracked economic conditions all the way back to 1790 and helped him gain a reputation for remarkably accurate opinions and predictions about the U.S. economy. The index is based on 10 indicators of economic health: pig iron consumption; railroad freight; cotton consumption; canal freight; coal production; railroad construction; blast furnace activity; rail production; locomotive production; and ship construction. A dashed line also tracks wholesale commodity prices.