TINNING • FREE-TRANSLATOR.COM • Definition of Tinning

... counted, and the increase branded in the summer. In the fall, when three or four years old, they are sold lean or in tolerable condition to dealers who take them by rail to Chicago, or elsewhere, where the fattest lots are slaughtered for tinning or for consumption in the Eastern cities, while the leaner are sold to farmers for feeding up during the winter. Some of the wealthier stockmen take their best lots to Chicago themselves. The Colorado cattle are either pure Texan or Spanish, or crosses between the Texan and graded ...

— A Lady's Life in the Rocky Mountains • Isabella L. Bird