While most of us are limited to the visible spectrum, people with a condition called aphakia possess ultraviolet vision. Aphakia is the lack of a lens, due to surgical removal for cataracts or congenital defects.
A railroad lantern and a railroad lamp are two different things. Lanterns were designed to be portable (i.e. carried) and were basically globes surrounded by a metal frame with a fuel source. When you think of a railroad worker swinging a signal, think lantern.
Description (Brief). This model of the Tom Thumb Locomotive was made by Bathe & Williams of Philadelphia, Pennsylvania in 1933. Greville Bathe was a machinist and steam engine hobbyist who would fashion his own parts to complete toy steam engines and models like this one.