Beinecke Rare Book and Manuscript Library > [No. 1183. A individuals sit on horseback in the Garden of the Gods near sandstone rock formations identified as Cathedral Spires, Colorado Springs (El Paso County), Colorado. Shows a dirt road and trees]
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.