Calendar: 1873-1874 Page 567

APPLIED SCIENCES 567 Required the area of triangular field the two adjacent sides of which were respectively 200 feet and 300 feet and the angle between them 60 eonutrical JDraiotrtg THIRD YEAR Take any points in plan figured to be I" 1" 25 and 27 respectively above the horizontal plane find the plan and eleva- tion of circle passing through them Let this circle be the base of right cone having its axis equal in length to the diameter of its base complete the cone in plan and elevation The vertical trace of certain oblique plane is line making an angle of 40 with xy the plane itself is inclined at 50 Show the plan and elevation of the section this plane would make when passing through the centre of sphere of 1"25 radius right cone base 2" diameter axis 2"י stands on hori- zontal plane take any point Λ on its surface not upon the axis base or sides and show in plan and elevation line drawn from Λ perpendicular to the surface produce the line through the figure and show the point at which it would leave the solid on the oppo- site side cylinder of 2" diameter is vertical another l"-5 diameter passes through it the axis of the smaller cylinder is inclined at 40 and is contained by vertical plane making an angle of 45 with show the intersection of the surfaces on one side only Draw correctly to scale the plan and elevation of the objects placed before you and project the shadows as directed SECOND TEAR Construct scale on which can be measured line 3"259 in length and mark the named measurement distinctly Show the plan and elevation of line inclined at 40 to horizontal plane and 35 to vertical plane