In the former chapters we dealt with typical cases of pattern-cutting for cylindrical pipe-elbows, selecting such examples as would serve to illustrate the general principles involved. In conical pipe-work it would not be a difficult matter to pick out scores of apparently different forms of joints, but which, on examination would be found could nearly all be resolved into a few simple types. In this chapter we therefore propose to treat just one or two representative cases of conical pipe-jointing, and these should be sufficient to explain the general method that can be applied to all this class of work. The first example to be dealt with will be that of a