By 1830, the population had grown to 1,135. Using water power from the streams, mills manufactured lumber, barrel staves, shingles, chair parts, bobbins, whip sockets, hosiery, bricks and washboards. Gristmills ground grain. Sheep farms, producing wool and mutton, were an important business. In 1840, there were 200 farms. Tubbs Union Academy was founded in 1849, and although it did not last long, the school once enrolled over 100 students from New Hampshire and beyond. The first Seventh-day Adventist church was established in Washington in 1862. In 1886, the town produced 53 tons of maple sugar.