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FIRST YEAR, SECOND YEAR

Unit I General Properties of Metals.

Unit VI Strength of Materials. Appearance. Elasticity. Weight. Transverse strength. Rigidity. Tension. Malleability. Defection. Resistance to machining. Elongation. Natural hardness. Torsion. Hardness and rigidity when heated and quenched. Hardness and rigidity at different temperatures. Hardness when heated and allowed to cool slowly.

Unit VII Heat Treatment of Steel. Hardening.

Unit II Shaping of Metals. Tempering.
6. Molding Case hardening. Rectangular block. Pack hardening. Bushing with core (parted pattern). Crowned pulley with core (coped out). b. Drop Flogging.
Simple offset lever. Unit VIII Pattern-making and Molding Flash. Shrinkage. Trimming dies. Finish. Draft.

Unit III Effect of Lubrication. Coring, Flat surface. Drop Forging. Roller and ball bearings Die Sinking. (Babbitt, composition. cast Lead Proofs. iron and hardened steel).

Unit IV Screw Threads. Principles of screw cutting. Single and multiple screws.

Unit IX Lubrication. Pitch. Cutting lubricants, etc. Lead.

Unit V Elementary mechanisms. Gearing (friction, spur, bevel. spiral worm, etc.).
Universal joints.

Unit X Mechanisms. Link mechanism (circular to re- Link mechanism.
circuiting motion. Variable Elementary applied mechanic-stroke. elliptical motions).


EXTENSION SHOP PRACTICE

Two years ago it seemed clear that the students were not fully acquainted with their machine tools, their parts, operation and care. Feeling that it was unwise to take part of the regular shop-week to remedy this defect, I re-arranged the program so that the shop instructor could take small groups to the factory .during the school week. One of the machine tools was placed in a special room and the group was instructed in the finer points .of operation and construction of the machine. Notes and drawings quiz by the instructor. The milling machine, drill, and lathe, were thus studied. This year the milling machine under power is the subject of study and practice. The results of this type of work have far exceeded our expectations and confirm us in the belief that this new l1lethod will prove a very practical part of the, school-room instruction. The boys are enthusiastic in their interest. During the coming year, I shall arrange that each group will spend at least four hours weekly in this work. The class-room work is being closely correlated to this, and we consider it a great step forward. The co-operation of the factory in providing the machines and extra space is most helpful.

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