Augustus Lowell several books on the Far East and on the planet Mars, and founded the Lowell Observatory in Flagstaff, Arizona. Their second son, Abbott Lawrence Lowell, succeeded Augustus as Trustee at the Lowell Institute in 1900, and became President of Harvard College in 1909, serving in that capacity until 1933. One of their daughters, Katharine Lowell, married (1) James Alfred Roosevelt, of the Long Island clan, and (2) T. James Bowlker, a Boston cotton mill owner. And their youngest daughter, Amy Lowell, 20 years younger than her brothers, would become the second celebrated poet in the Lowell family (Greenslet 1946). Augustus
Lowell Observatory first trustee was Lowell's third cousin Guy Lowell (1916–1927). Percival's nephew Roger Putnam served from 1927 to 1967, followed by Roger's son Michael (1967–1987), Michael's brother William Lowell Putnam III (1987–2013), and current trustee W. Lowell Putnam. The observatory operates several telescopes at three locations in the Flagstaff area. The main facility, located on Mars Hill just west of downtown Flagstaff, houses the original Clark Refracting Telescope, which is now used for public education, with 85,000 annual visitors. The telescope, built in 1896 for $20,000, was assembled in Boston by Alvan Clark & Sons and then shipped by train to