No. 22. Calculation of Elements of Machine Design.—Factor of Safety; Strength of Bolts; Riveted Joints; Keys and Keyways; Toggle-joints.

No. 23. Theory of Crane Design.—Jib Cranes; Shafts, Gears, and Bearings; Force to Move Crane Trolleys; Pillar Cranes.

No. 24. Examples of Calculating Designs.—Charts in Designing; Punch and Riveter Frames; Shear Frames; Billet and Bar Passes; etc.

No. 25. Deep Hole Drilling.—Methods of Drilling; Construction of Drills.

No. 26. Modern Punch and Die Construction.—Construction and Use of Sub-press Dies; Modern Blanking Die Construction; Drawing and Forming Dies.

No. 27. Locomotive Design, Part I.—Boilers, Cylinders, Pipes and Pistons.

No. 28. Locomotive Design, Part II.—Stephenson and Walschaerts Valve Motions; Theory, Calculation and Design.

No. 29. Locomotive Design, Part III.—Smokebox; Exhaust Pipe; Frames; Cross-heads; Guide Bars; Connecting-rods; Crank-pins; Axles; Driving-wheels.

No. 30. Locomotive Design, Part IV.—Springs, Trucks, Cab and Tender.

No. 31. Screw Thread Tools and Gages.