Original photograph: 21 x 16 cm, black & white photo, with #12 (circled two ##12), "60%", and "654A" written in front in pencil, caption under photo reads "Barton Bros., irrigating 65 acre field of potatoes; showing application, July 1, 1929", from Gray Album, page 25 Digital reproduction of photograph: Barton Bros., irrigating 65 acre field of potatoes; showing application, Gray Album, Bureau of Reclamation
