National Geographic : 1951 Nov
© National Geographic Society 658 Kodachrome by Willard R.Culver Junior Rockhounds of Prescott, Arizona, Aged 7 to 15, Hear President Martin Hoffman Discuss aSpecimen This club of about 40 boys and girls operates without adult assistance. On field trips, members gather stones for theircollections. Large specimen beside the books is Oklahoma barite rose. The lamp on the table is used for examining fluorescentminerals.