A furnace of refractory material to take high heat.

Reamer. A tool designed to enlarge or to smooth out holes.

Regulation. To do things in an orderly way; a system which sets
forth certain requirements.

Refractory. Difficult to work, and not easily fused.

Recess. A hole, or a depression.

Rocking. A lever which rotates only part way and then moves in
the opposite direction.

Rotate. A spindle which turns round. Compare revolve.

Rosin. Certain gums; particularly the sap of pine trees.

Roughing. The taking off of the first coating with a tool.

Saturated. A soluble substance which cannot be further dissolved
by a liquid.

Scribe. To mark with a tool.

Screw plate. A tool which has within it means for adjusting
different cutting tools.

Section lining. The marks made diagonally across drawings to indicate
that the part is cut away.

Shaper. A large tool for surfacing off material, cutting
grooves, and the like.

Shrinkage. The term applied to metals when cast, as all will be
smaller when cold than when cast in the mold.

Slide rest. The part of the lathe which holds the tool post.

Sonorous. Having the quality of vibration.

Slotted. Grooved, or channeled.

Solvent. That which can be changed from a solid by liquids.

Spelter. A combination of zinc and copper. A hard solder.

Soldering. Uniting of two substances by a third, with heat.

Spindle. A small shaft.

Spur. The larger of two intermeshing gears.

Socket. A depression or hole.

Sprocket. Teeth in a wheel to receive a chain.

Spiral. A form wound like the threads of a screw.

Surface plate. A true surface made of metal, used as a means of
determining evenness of the article made.

Sulphate. Any substance which is modified by sulphuric acid.

Substitute. An element or substance used for another.

Superposed. One placed above the other.

Swage. Tool for the purpose of changing the form in a
material.

Swivel. A point on which another turns.

Surfacing. Taking off the outer coating or covering.

Tap. A small drill.

Tapering. An