Directions for making the best composition for the metals of reflecting telescopes Together with a description of the process for grinding, polishing, and giving the great speculum the true parabolic curve. By Mr. John Mudge. Read at the Royal Society, Feb 27. March 6. an 13. 1777 - Mudge, John 1721-1793 (printed by W. Bowyer and J. Nichols, 1777)
English Short Title Catalog, T130491