A studious young boy sits at a desk, dutifully taking notes and minding his timepiece; underfoot dust particulates sit locked in a petroleum-based liquid so as to not waft upward when disturbed, thus keeping the indoor environment pleasant and ideal for learning. After all, it's well known that "The constant shuffling of feet in the schoolroom, and the more violent exercise in the gymnasium, stir up dust and circulate it in dangerous quantities." Superfluous as this is, it is exactly what is described in this ad for Standard Oil Company's Standard Floor Dressing product from the May 1912 issue of American Educator. A free pamphlet, a full-room demonstration and a guarantee that "vegetable and animal germs cannot find subsistence in it" were all part of the product package.
