National Geographic : 1940 Jun
00 JUPITER TERRACE OF MAMMOTH HOT SPRINGS IN 1872-ONE OF THE FIRST PICTURES EVER MADE INYELLOWSTONE This striking photograph is taken from the remarkable collection of William H. Jackson, pioneer photographerand explorer, now 97years old, who visited the Yellowstone with a survey party in 1871 and whose photographs were instrumental in inducing Congress the following year tomake itanational park. In1872 he returned, using 11-by-14 -inch wet plates. Later he even employed a huge 20-by-24 -inch camera, for enlargements atthat time were unknown. Here atMam moth Hot Springs Jackson washed his plates in natural warm water from the terraces. This mountain is turning inside out(pages 785 and 790).