St. Paul had a broom factory, canning factory, brick factory, cigar factory, two flour mills, hatchery and more. Through the years innovation like the first self-rising flour was developed at one of the flour mills. The first chicken hatchery in Nebraska started in Cushing in 1901, moved to St. Paul in 1922, and operated until 1956. Pirus, a cure for many kidney and liver ailments, was invented in St. Paul. Dorothy Lynch invented her famous salad dressing in St. Paul, which is now sold nationally.