728                           MINERAL RESOURCES; 1918----PART I.
	discussed. The data giving the total production, and in part the distribution, are obtained from records of (1) the unrefined domestic gold and silver deposited in United States mints and assay offices, (2) the domestic gold and silver in fine bars reported by private refineries, and (3) the unrefined domestic gold and silver contained in ores and matte exported for reduction. The, last item is of small relative importance.
	In addition to the gold and silver produced by domestic smelters and refiners from domestic sources in 1918, amounting to 3,320,784 fine ounces of gold and 67,810,139 fine ounces of silver, these plants produced 566,886 fine ounces of gold and 55,979,420 fine ounces of silver from foreign ores and bullion, a decrease of 202,285 ounces of gold and an increase of 5,872,609 ounces of silver compared with the corresponding figures for 1917. The foreign ores producing this bullion came mainly from Mexico and Canada. The value of the new gold used in the arts and industries in the United States in 1918 was $32,892,395, as compared with $34,803,445 in 1917, and the quantity of silver used for such purposes in 1918 was 26,722,333 fine ounces, compared with 15,998,807 ounces in 1917. Part of the large increase of about 10,724,000 ounces of silver so used was due to the expansion of the photograph-film and moving-picture industries. The consumption of silver in the arts and in­dustries was equal to 39 per cent of the domestic production and that of gold to 48 per cent of the domestic production. In addition to the gold and silver derived from foreign and domestic ores and bullion 819,067 fine ounces of gold and 8,526,122 fine ounces of silver were recovered from old jewelry, dental waste, silverware, and other old material.