IN NATURE (vol. xx. p. 103) there appears an abstract of a paper by Prof. E. W. Blake on a machine for drawing compound harmonic curves. Prof. Blake is doubtless not aware that this machine is based ...

One of the greatest impediments to efficient production of high-performance composite parts is part designs that incorporate compound curves. Painstaking and tedious darting and goring often are ...

THE early part of this book is devoted to a discussion on the principles underlying transition curves. The objects of a transition curve on a railway are to provide a gradual increase in curvature ...