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. and 13. 1777.
Mudge, John,1721-1793.
London : printed by W. Bowyer and J. Nichols,
1777.
ESTC