By the time of his death, William Herschel (1738-1822) had built revolutionary telescopes, identified hundreds of binary stars, and published astronomical papers in over forty volumes of the Royal Society’s Philosophical Transactions. This two-volume collection, which originally appeared in 1912, was the first to gather together his scattered publications. It draws also on a wealth of previously unpublished material, from personal letters to numerous papers presented to the Philosophical Society of Bath. Although Herschel is best known for his discovery of Uranus, this collection highlights the true range of his observations and interests. Focusing on his later work, Volume 2 includes notes on some of the moons of Uranus, studies of solar heat and the atmosphere of Saturn, and some practical experiments investigating the capabilities of contemporary telescopes. It also features an appendix of work compiled by his son, John Herschel, and sister Caroline.