Calendar: 1881-1882 Page 668

applied sciences 669 Two lines AB CD are respectively inclined at 15 and to given line EF Through an assumed point not midway between the lines draw third line which would meet the other two lines in point which is supposed to be outside the limits of the paper Find fourth proportional to three lines 2" 2£ and long respectively right cone appears in elevation as an isosceles triangle base 2" altitude 3" Take any point Η on its surface and find the plan of the cone and the point From the point Η in the last figure draw line 15 long perpendicular to the surface of the cone and show it in plan and elevation Also through or any other point on any somewhat similar cone draw line to represent the trace of plane which makes section of the cone the horizontal trace being inclined at 40 to χ Show section and true form Any pyramid with hexagonal or octagonal base lies on the horizontal plane on one of its triangular faces Show it in plan and elevation and the true form of the section made by vertical plane inclined at 40 to the plan of its axis 10 cylinder 1" diameter 25 axis has the latter in- clined at 35 and contained by plane inclined at 40 Show lan and elevation architectural drawing signal-mu hut at level railway crossing has two rooms on the ground floor only one leading out of the other Total floor area 288 square feet Show plan elevation and section with porch and any other details Scale to Γ All dimensions to be shown in figures Height material style &c at pleasure and give rough estimate of cost at say per foot cube engineering drawing Make design for wall bracket for brick pier to carry S" shaft parallel to the surface and 12" from it Show its