Page:Popular Science Monthly Volume 92.djvu/954

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��Popular Science Monthly

��On the side view B draw a line from the apex through the lower left-hand corner of the rectangular pipe until it strikes the base line, then drop it straight down to the bottom view quarter circle, mark X. Do the same with the upper right- hand corner and the lower right-hand corner, marking them respectively Y and Z. Now transfer with the dividers from the side view B bottom quarter circle to the front view A quarter circle the points X, Y, Z, getting the correct distance from points 2 and 3. From X, Y, and Z on the front view A draw lines straight up to the base line, then to the apex. Now draw the lines over from the side view to the front and make crosses just as you did with the regular numbered lines. Con- nect the crosses and you will have the complete joint line. The dotted part of the joint line is drawn dotted because it is invisible, as it is back of the pipe.

Now that we have the joint line we can proceed with the development of the cone pattern. It is only necessary to develop one-quarter because the important part is the hole and by marking off the pattern four times we can get the full pattern. This also saves metal and bulkiness of patterns.

In the usual manner draw the top and bottom pattern arcs 1-5 and M-N, getting the correct length as usual by getting the spaces from the numbered points on the bottom view circle. Be sure and include the "auxiliary points." Then from the points where the lines we used to get the joint line cross the line apex-P, draw circles around to the pattern until they cross the same numbered or lettered lines. Where they intersect make crosses, then connect these with curves and the one- quarter pattern will be complete.

Now we have to get the pattern for the rectangular pipe. Notice that we already have the correct pattern for the two long sides of the pipe on the front view A. The front side is marked C and the back is marked D. Transfer the size and shape of C to the pattern, using the line H-K as a base line, getting the correct lengths from the end view of the pipe on view B. We must next get the pattern for the top of the pipe. This is done by the use of the top view G. Project two lines up- wards from the rectangular pipe to points L and li on the top view, then draw the

��arc L-R. From the front view A get the correct length of the pipe and set it off on the top view G. This will give us the pattern for the top of the pipe E. Place this with C on the pipe pattern, next transfer the side D from the front view. To get the pattern F for the bot- tom of the rectangular pipe: On the side view B draw a line from the F to the line apex-5. Then up to point S on the top view. Then draw the circle S-T as indi- cated and you will have the pattern for the bottom F. Place this next to D and the pipe pattern is complete. {To be continued)

��Making a Lattice Trellis for Roses and Vines

A GOOD trellis for roses may be made as follows: many lj'2-iri- by M-ii^- strips there are feet to the width and length, and also as many for

��and vines Procure as of wood as of the right every foot

���The strips of wood are interlaced in the construction of this trelhs for roses

in length and proceed as follows. First lay out marks 12 in. apart on the strip to be used as a base, then tack the pieces that are to be used upright to these, each alter- nating piece on the other side from that nailed last, then interlace the cross pieces in these lengths as in weaving. The trellis will then have the appearance as shown at A. This lacing of the strips makes the trellis quite substantial. — Louis M. Wahrer.

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