The golden ratio should not need any introduction to those who have studied math and design in school. Some designers apply these mathematical concepts to come up with more visually appealing works. This infographic from companyfolders.com covers a few golden ratio facts:
The making of a stained glass window in a French cathedral during the High Middle Ages by Jean-Claude Golvin
The accident at the gare Montparnasse. Paris, on October 22, 1895.
Trenes y tiempos: Los automotores de la postguerra (II): De "rácanos" a "talguillos" (RENFE 9002-9013 reformados)
1931 Rail Zeppelin
A "Hartley & Teeter Track Inspection Pedicycle", manufactured by the the Light Inspection Car Co. of Hagerstown, Indiana circa 1880.
Michelin rail car ===> https://de.pinterest.com/rfojkar/automobilgeschichte/