William Herschel

XV. Account of the changes that have happened, during the last twenty-five years, in the relative situation of double-stars; with an investigation of the cause to which they are owing

William Herschel, W. Herschel, 1803, Philosophical Transactions of the Royal Society of London.

IV. On the power of penetrating into space by telescopes; with a comparative determination of the extent of that power in natural vision, and in telescopes of various sizes and constructions; illustrated by select observations

William Herschel, 1800, Philosophical Transactions of the Royal Society of London.