Calendar: 1882-1883 Page 674

APPLIED SCIENCES 671 11 State what you know regarding the crystalline structure and working properties of pig-iron cast-iron chilled iron mild Siemens steel wrought iron and crucible steel Why are castings never chilled through 12 In what respects does the Thomas-Gilchrist or basic Bessemer process differ from the "acid" Bessemer process in the nature of the plant in the pig-iron used in the carrying out of the process in the character of the product CJe Worktop THIRD YEAR Describe the use of the countershaft Sketch one with an arrangement of pulleys for reversing the machine Sketch an arrangement of pulleys on countershaft for reversing and quick return motion indicating fast and loose pulleys Sketch the mandril head of lathe with double cone bearings shown in section Sketch the arrangement of levers and knife edges for measuring the strain in the new testing machine Sketch the arrangement of gripping tackle for testing boiler plates in this machine Describe the process of making plumber's wiped joint and the risks to be specially guarded against SECOND YEAR Sketch sectional view of thfe mandril head of single gear lathe Sketch the section of the poppet head of lathe showing the working of the cylinder and screw The leading screw of lathe is to the inch give the change wheels to cut inch screw Whitworth thread With leading screw to the inch give the wheels for feed of 50 to the inch