No. 52. Advanced Shop Arithmetic for the Machinist.
No. 53. Use of Logarithms and Logarithmic Tables.
No. 54. Solution of Triangles, Part I.—Methods, Rules and Examples.
No. 55. Solution of Triangles, Part II.—Tables of Natural Functions.
No. 56. Ball Bearings.—Principles of Design and Construction.
No. 57. Metal Spinning.—Machines, Tools and Methods Used.
No. 58. Helical and Elliptic Springs.—Calculation and Design.
No. 59. Machines, Tools and Methods of Automobile Manufacture.
No. 60. Construction and Manufacture of Automobiles.
No. 61. Blacksmith Shop Practice.—Model Blacksmith Shop; Welding; Forging of Hooks and Chains; Miscellaneous.