Calendar: 1867-1868 Page 493

494 APPLIED SCIENCES When the plane containing two of them is inclined at 30 and the lines in that plane are inclined at equal angles Three spheres of 175 inches radii have their centres inches above the paper each sphere touches the other two represent these spheres by plan and elevation FIRST YEAR Draw parallel lines inches apart and 20 inches long and others of the same distance and length at right angles to the first in each of the 16 squares thus formed inscribe circle On line inches long as side describe an equilateral triangle pentagon and heptagon on the opposite side of the same line draw square hexagon and an octagon cube of inches edge is to be represented by plan and elevation in two at least of the following positions When one edge is horizontal and an adjacent face in- clined at 30 When one diagonal of the solid is horizontal otherwise at pleasure When standing on plane inclined at 50 and one edge in that plane inclined at 30 III -iSanutarturtng Tirt anU iHarijtturj SECOND TEAR What advantages are gained by using steam-jacket to the cylinder of steam-engine Give the reasons for and the methods of superheating steam Describe the steam-engine indicator and give the method of taking figure from the single-acting Cornish pumping engine Sketch and describe the various steain-engine governors more particularly those invented by Mr Siemens Give the forms of parallel motion used in the steam-engine and show how you would determine the length of the radius rod in grasshopper engine similar in construction to that seen at the works Messrs Penn and Sons