自欧战始。工业化学遂更形重要。盖有无数化学品日可购自德国者今则全赖自制矣美国制造家已竭力经营不为德困然尚有未能全供社会,一急需者如染料其最彰,较著而关於工业之最为密切者也染料制自煤油为煤业之副产物而德制最佳故欧战之初染料即大受影响美国所制造者需时多而质逊深? Since the war in Europe. Industrial chemistry is more important. Covering countless chemicals can be bought from Germany, now rely on the homemade system. The United States manufacturers have tried their best to run non-virtuous, there are still not all for the community, an urgent need, such as dye the most of them, more obvious about the industry The most intimate dyes are also produced from kerosene as a byproduct of the coal industry. Therefore, the dye at the beginning of the European war is greatly affected.