are parallel to the othersides. They likewise give thetrue diameterof the wheels, reduced to the scale required. The ellipse itself may be drawn by anelliptic compass, as that instrument may beproperly set, if the major and minor axes areknown. If it be intended to represent a wheelon an axle, care… … described, and seen through it if the paper benot too thick ; and in this method the smallerconcentric circles of the wheel may bedescribed at the same time, as they may beseen through the picture; or, if they shouldnot be exactly of the right size, it would beeasy to describe them by hand, between…
Design · Decoration and ornament · Art
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-89-18.webp)
