Show 0 ASPHALT IN 1914 although there was a decrease in the marketed production of natural asphalt and of manufactured or oil asphalt derived from domestic sources in the united states slates in 1914 the decrease was more than offset by the greatly increased output from american refineries of oil asphalt derived from from crude pert oleum imported from mexico according to J D northrop of the U S geological survey who attributes the decline in asphalt production from domestic sources chiefly to the increasing use of the product manufactured from mexican oils the output of natural asphalt in 1914 amounted to short tons valued at the output of oil asphalt from domestic petroleum amounted to short tons valued at and the output from american refineries of oil asphalt from mexican petroleum amounted to short tons valued at compared with 1913 the output of natural asphalt in 1914 declined 16 per cent and that of domestic oil asphalt 17 per cent whereas the output of mexican oil asphalt increased per cent locally in texas and utah the output of certain varieties of naturally occurring asphalt required for special purposes showed a gratifying increase in california a notable increase in the output of oil asphalt derived wholly from domestic petroleum tr resulted largely from an increase in the use of asphalt in highway and pavement construction in the state material and products to the value of were imported for consumption during the calendar year E exports sports during the same period amounted in value to leaving a trade balance of to be credited to the domestic asphalt industry |