By C. F. ARCHER, Certificated Teacher, Subject II. ELEMENTARY STAGE.

1. Hexagon and Square-headed Bolts and Nuts.

2. Flange Coupling for Shafts of different diameter.

3. Hydraulic Pipe Joint.

4. Steam Piston.

5. Cylinder Cover and Stuffing Box.

6. Full Way Stop Valve.

On Separate Sheets, 13 1/2 inches by 9 1/2 inches, the Six in a Packet, Sixpence.

Advanced Stage

1. Launch Engine.

2. Details of Crank Shaft and Columns.

3. Details of Slide Valve and Link Motion.

4. Details of Piston, Crosshead, and Connecting Rod.

5. Launch Engine Cylinder.

6. Details of Bed-plate.

On Separate Sheets, 13 1/2 inches by 9 1/2 inches, the Six in a Packet, Sixpence.

GRIFFITH, FARRAN, OKEDEN & WELSH, LONDON.