Dated ca. 1930-1943, this is a photograph of boiling soap at one of the Procter and Gamble buildings. The Procter and Gamble Company Plant, located on Spring Grove Avenue between Mill Creek and Township Avenue, in the Cincinnati suburb of St. Bernard, originally covered 11 acres in a section called Ivorydale. It was, and still is, one of the largest soap manufacturing plants in the world. The original plant dates to about 1885, when Proctor and Gamble expanded operations from their downtown location. William Procter, a candlemaker, and James Gamble, a soapmaker, formed the company known as Procter & Gamble in 1837. The two men, immigrants from England and Ireland respectively, had settled earlier in Cincinnati and had married sisters. The...