Calendar: 1861-1862 Page 506

APPLIED SCIENCES 507 Draw an ellipse major axis 3" minor axis 2" Find its foci At any point in the curve not at the extremity of either axis draw tangent Given two conjugate diameters of an ellipse 3" and 2" respectively and making an angle of 140 determine the curve and find its axes wheel whose radius is lj" runs along straight line draw the curve described by nail-head in one of its spokes distant 9" from the centre 10 Draw half of the epicycloid generated by circle radius j" revolving round the circumference of fixed circle radius 1" and half the hypocycloid generated by one of diameter VI -£olto mctrj One face of cube of 3" edge is inclined at 65 and one edge of that face at 15 draw the plan of the solid and of the circumscribing sphere The three corners of one face of an octahedron are at heights of 8" 7" 2" respectively above the draw the plan and elevation of the solid and horizontal section passing through the centre of it Side of solid 2£" ύ Draw the plan of hexagonal prism resting on one edge of its base the latter being inclined at 35 and the shadow thrown by rays of light making an angle of 50 with the horizon and in direction an angle of 30 with one side of the plan The solid and shadow to be tinted dimensions at pleasure Two adjacent sides of an equilateral triangle 3" side are inclined at 25 and 35 draw its plan and an elevation on plane parallel to one side of the plan VII -CijcmuSto Describe the Plate Electrical Machine What is supposed to occur during the charging of Leyden jar with Electricity