(about the axes x and y), we may alter or deform this {729} network in various ways, several of which are very simple indeed. Thus (1) we may alter the dimensions of our system, extending it along one or other axis, and so converting each little square into a corôÙreôÙsponôÙding and directly proportionate oblong (Fig. 353). It follows that any figure which we may have inscribed in the
Fig. 352. Fig. 353.
Fig. 354. Fig. 355.
original net, and which