n good order), the connexion between the rail and chair must bosuch as to allow of the libratory motion arising from deflection, the rail beingnevertheless firmly fixed upon its seat, incapable of rising therefrom, andprevented from lateral movement; at the same time it should be free to… … Plan of Double Chair, the Rail being omitted.
Civil engineering · Architecture
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher04nati-12-4.webp)