was guided into the filaments of a fountain in Geneva (Figure 1). The following year, in 1842,
Jacques Babinet noted the same thing in the water streams and glass sticks. In 1880,
William Wheeler employed glass tubes to illuminate a place with a light source placed
elsewhere: light could be guided by the glass. In 1888, Roth and Reuss used glass tubes in
medicine for illuminating cavities and viscera of the body [1].