Egypt, i2i years before Christ, invented amethod, and between that time and the last centurya oreat many inventions were made along the same The oil used by the ancients was purely vegetable, savein the far northern countries, where animal oil wasused which offered greater resistance to freezing.… … Fig. 5. line. Peter Keir finally invented a great method forits day by adding to the oil a fluid whose specificgravity was so much greater that the oil easily rose totbe top. The real lamp, as we know it to-day, came withthe practical use of petroleum—rock oil, as the Ro-mans called it, from the…
Pottery · Glass · Glassware
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
