It is a valuable machine. This article was originally published with the title “ Boring and Mortising Machine ” in Scientific American Magazine Vol. 13 No. 10 ( November 1857 ) , p. 75 doi: 10 ...

This article was originally published with the title “ Kittinger's Boring and Mórtising Machine ” in Scientific American Magazine Vol. 13 No. 13 (December 1857), p. 97 doi:10.1038 ...