Description of a forty-feet reflecting telescope By William Herschel, LL.D. F.R.S. From The philosophical transactions - Herschel, William Sir 1738-1822 (1795)
English Short Title Catalog, N6196
Note on p. 1: Read before the Royal Society, June 11, 1795
Reprinted from vol. 85 of 'The philosophical transactions' of the Royal Society
Reproduction of original from Harvard University Houghton Library