Really neat old technical magazine loaded with detailed illustrations, technical information and patents of the time. The magazine itself has 14 pages and there is also a supplement dated June 16th, 1877 with an additional 10 pages. Both items do show their age with some staining and missing paper at the edges as they are brittle. Still a great reference and view of the technology at the time over 130 years ago! $15 postpaid in the US.