938 



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. 



