ROYAL SOCIETY. Philosophical Transactions of the Royal Society of London. For the Year MDCCCLXXX. Vol. 171 - Part 1. 419, [1]p., 13 plates. A very good clean copy in original gilt lettered cloth. 4to. Harrison and Sons. 1880. ~ Includes: “On Some Recent Improvements in the Mountings of Telescopes at Birr Castle - By the Earl of Rosse.”