Course of water.—What is the course of the main injection water of a jet condenser? What is the course of the main circulating water of a surface condenser? [II. 442].

Surface condensing.—What are the advantages of surface condensing? How are surface condensers cleaned out? [II. 442].

Engine-room cocks and valves.—What cocks and valves are there in the engine room of a condensing engine? [II. 442].

Donkey engine.—What is a donkey engine? What pipes connect to a donkey engine, and what are their uses? [II. 442].

Pipes to the sea.—What are the pipes that lead from or go to the sea? [II. 442].

Parts classified.—What parts of a marine engine are generally made of wrought iron, of cast iron, of brass, and what of steel? [II. 442].

Use of Babbitt.—What is Babbitt metal or white metal used for? [II. 442].

Use of Muntz.—What is Muntz metal used for? [II. 442].

Breaking strain.—About what is the breaking strain of wrought iron per square inch of section? [II. 442].

Tempering.—How is steel tempered? [II. 442], [460]-[463].