Winnowing Machine Small 320×227 Medium 640×455 Large 1024×728 Download TIFF Original 3161×2246 | (1.6 MB) Description A winnowing machine was traditionally used to separate yield from chaff. The pictured type of winnowing machine was likely used to separate chaff from tea leaves. Keywords brewing, making tea, tea leaf treatment, winnowing, winnowing machine Galleries Brewing, Food Source: Report of the Commissioner of Agriculture for the year 1877 (Washington, District of Columbia: Government Printing Office, 1878) 360, plate VIII