3 min.
CONTOURS
WHLE IT CANNOT be claimed that contours or profiles are easily produced or dupicated in reverse, the problem is far less formidable than might appear at first sight-given time, care and some acquaintance with the principles, which, in general, differ little whatever the size or class of work.
In the case of a reverse duplicate, the problem is easily solved if the existing contour is accessible in that the part or material containing it can be laid flat on the other material and marked round. Then it simply means cutting, filing, finishing, etc., as necessary. A contour, however, which is inaccessible in this sense beacuse of its position or the form of the part must be duplicated by other means.
The simplest case, perhaps, is in fitting line to an…