This work it does silently; the old chisel mortiser in full operation was a most disagree-able machine in the shop, while the chain mortiser wo rks almost in .silence. The chips which it makes are ...

by which means the auger and chisel are raised and lowered. Similar letters refer to the same parts in each. A is the stuff in which the mortise is to be cut, and B, the base of the machine on ...

It can be cut by hand with a mallet and mortising chisel, or mechanically with a mortising machine and a hollow chisel bit. If you don’t have those tools, a mortise can also be made with a drill ...