In 1900, Foreman Sloan left the business, but Earl continued, adopting his father's title "Doctor" and organizing a company to manufacture the liniment. The company offices were moved to Boston in 1904 when Dr. Sloan purchased a large factory building, formerly owned by Green's Nervura Medicine Company. On October 26 of that same year, the business was incorporated as "Dr. Earl S. Sloan, Incorporated." Records in the office of the Secretary of State for the Commonwealth of Massachusetts disclose that the authorized capital for the new corporation consists of $50,000, $10 per parcel. The principals of the new corporation were Dr. Sloan, Archie MacKeigan, and Andrew Sloan, who served as the Treasurer. A business report of the time indicated that "the concern is recorded as one of the largest of its kind and goods are sold extensively throughout the country."