William Parsons,
3rd Earl of Rosse
The grounds at Birr Castle. Foreground (72") and background (36")
Engraving of the 36"
Engraving of the 72 inch "Leviathan of Parson's Town"
The 72 inch speculum mirror
copper:tin (2:1) gives ~70% reflectance @ 600nm
Photo of 72 inch, hand painted
Rosse's sketches of M99, M51 and M33
Click on images to see larger versions (of some)