Calendar: 1873-1874 Page 568

568 APPLIED SCIENCES Show by their traces parallel planes inch apart both planes being oblique to and Show plan and elevaiion of regular octagon of 1" side when the plane of the figure is inclined at 47 and one diagonal at 37 degrees in that plane Plan and elevation of right cylinder 1"5 diameter axis vertical and 2"5 in length Draw circle of 1" diameter on the elevation of the cylinder and find the true form of the figure it represents Find the intersection of the surfaces of sphere of 2"5 diameter and cylinder 1"5 diameter when the axis of the latter is horizontal passes through the centre of the sphere and makes an angle of 50" with the vertical plane plane inclined at 40 has its horizontal trace shown as line making 30" with xy find its vertical trace FIRST YEAR Construct an irregular sided figure under the following conditions The base AB is line 1"75 long BC DE and EA are 1"5 the diagonals AC and AD are each 2"-5 inches Divide line AB 1"5 in length in such proportion that the rectangle contained by the whole and one of the parts shall be equal to the square of the other part Construct plain scale of feet to inch to show 25 feet regular pentagon of 1"25 side is contained by plane inclined at 40 show plan and elevation Consider the pentagon to be the end of right prism 3" in length find plan of it when one diagonal of the solid is vertical portion of cylindrical shaft 2" diameter and 3" long has its axis horizontal and inclined at 35 to the vertical plane find its elevation and the true form of the section made by vertical plane cutting the axis at any angle except 90 arts of Construction -Drawings to be neat hand-sketches to scale What is common concrete and how made