Beinecke Rare Book and Manuscript Library > [No. 1407. View of foothills and snow on Pikes Peak Austin Bluffs in El Paso County, Colorado. Trees and an eroded wash are on a hillside. A house is in a meadow beside possibly a windmill]
A mammoth plate is a photographic negative plate size, usually 18 by 21 inches (53.5 x 45.7 cm.) with photographic prints made through contact printing.