Slight changes in the camphene-lamp enabled him to burn the distillate without smoke. Improvements in the lamp, especially the addition of the “Virna burner,” and in the quality of the fluid brought the “carbon-oil,” as it was usually termed, to a goodly measure of perfection. One lot of oil used in these experiments was a purchase of three barrels in April, 1853, from Charles Lockhart, now an officer of the Standard Oil-Company in Pittsburg. It came from the Huff well, a mile down the river from Tarentum. “Carbon-oil” sold readily for a dollar-fifty per gallon and provided a market for all the petroleum the salt-wells in the vicinity could produce. The day was dawning and the great light of the nineteenth century had been foreshadowed in the broad commonwealth that was to send it forth on its shining mission to all mankind. [Illustration: SAMUEL M. KIER.] Samuel M. Kier slumbers in Allegheny cemetery, resting in peace “after life’s fitful fever.” He was the first to appreciate the value of petroleum and to purify it by ordinary refining. His product was in brisk demand for illuminating purposes. He invented a lamp with a four-pronged burner, arranged to admit air and give a steady light. If he failed to reap the highest advantage from his researches, to patent his process and to sink wells for petroleum alone, he paved the way for others, enlarged the field of the product’s usefulness and by his labors suggested its extensive development. Has not he earned a monument more enduring than brass or marble? “As in a building Stone rests on stone, and wanting the foundation All would be wanting, so in human life Each action rests on the foregoing event That made it possible, but is forgotten And buried in the earth.”