New York [etc.] Simmons-Boardman Pub. Co. [etc.] · leaf 149
safety, which are indicated respectively byalso the guard arm with cushioned buffer a, as shown indotted outlines. The solid outlines designate a fixed con-lour of the rigid arms; the remaining dotted lines shownrepresent the limit of draw-bar head; a< repre-sents the heel of the knuckle which…
Railroads · Railroad cars
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-45-6.webp)
