ABSTRACTJosephinite is a naturally‐occurring, terrestrial nickel‐iron alloy, found along Josephine Creek, Josephine County, Oregon, and associated with stream gravels as water‐worn pebbles, sometimes ellipsoidal in shape. A group of more than 75 specimens examined gave the following physical and chemical data: average sp. gr., 5.66; hardness, 4.5 to 5.0; streak, lead‐gray; luster, metallic; fracture, hackly; malleable, sectile; strongly magnetic; opaque. The group of specimens examined ran as follows: largest dimension, 3.2 mm. to 31.4 mm. The chemical formula for josephinite is written usually as Fe2Ni5, altho josephinite contains also a little cobalt, phosphorus, and