Ellsworth M. Longfield

“ Measuring lines from each point are drawn at right angles to the fine of stretchout. The intersections of the developed miter line, as shown in Fig. 97, should now be lettered. It should be noticed that the position of the lettering is changed as was the numbering of the profile, and for the same reason. A line is dropped from point E of the developed miter line until it intersects line E of the stretchout in Fig. 99. The intersection is marked with a small circle. In like manner intersections for all other points of the developed miter line should be located. ”

“ The Tangent Tee Not at Right Angles.—Figure 111 shows a side elevation which has the same appearance as the side elevation of Fig. 106. The branch pipe, however, is tipped towards the eye as will be seen by studying Fig. 112. Every tangent tee at other than right angles must have the entire miter line developed. ”

“ Problem 18A.—Two heaters are to be connected to a chimney flue by one pipe. One heater has an 8-inch, and the other a 10-inch neck. How large must the main pipe be to serve both heaters?
Problem 18B.—A battery of three steam heaters having 81⁄2" smoke necks are to be connected to the chimney by one main pipe. (a) What will be the diameter of the main between the second and the third heaters? ”