1857, Anaheim was founded by 50 German-Americans (with lineage extending back to Franconia) in search of a suitable grape-growing region. This group purchased a 1,165 acres (4.71 km2) parcel from Juan Pacifico Ontiveros's Rancho San Juan Cajon de Santa Ana for $2 per acre and later formed the Anaheim Vineyard Company. With surveyor George Hansen, two of the wine colony's founders, John Frohling and Charles Kohler, planted 400,000 grapevines along the Santa Ana River; by 1875, "there were as many as 50 wineries in Anaheim, and the city’s wine production topped 1 million gallons annually." Despite later afflictions of both Phylloxera and Pierce's Disease, wine growing is still practiced. A severe drought in the 1860s devastated the prevailing industry, cattle ranching, and much land came into the possession of Richard O'Neill Sr. James Irvine and other land barons. In 1887, silver was discovered in the Santa Ana Mountains, attracting settlers via the Santa Fe and Southern Pacific Railroads. High rates of Anglo migration gradually moved Mexicans into colonias, or segregated ethnic enclaves. County establishment After several failed attempts in previous sessions, the California legislature passed a bill authorizing the portion of Los Angeles County south of Coyote Creek to hold a referendum on whether to remain part of Los Angeles County or to secede and form a new county to be named “Orange” as directed by the legislature. The referendum required a 2/3 vote for secession to take place, and on June 4, 1889, the vote was 2,509 to 500 in favor of secession. After the referendum, Los Angeles County filed three lawsuits to prevent the secession, but their attempts were futile. On July 17, 1889, a second referendum was held south of the Coyote Creek to determine if the county seat of the new county would be Anaheim or Santa Ana, along with an election for every county officer. Santa Ana defeated Anaheim in the referendum. With the referendum having passed, the County of Orange was officially incorporated on August 1, 1889. Since the incorporation of the county, the only geographical changes made to the boundary was when the County and Los Angeles County traded some parcels of land around Coyote Creek to conform to city blocks. The county is said to have been named for the citrus fruit in an attempt to promote immigration by suggesting a semi-tropical paradise – a place where anything could grow. 20th century