Back

Converging and diverging, _256_; heat, concentrated by the collision of elastic bodies, on the Electric Light. Figure 1 Spectrum of Electric Light. 7. Combustion by Invisible Rays. 8. Transmutation of Rays: Calorescence. [Footnote: I borrow this term from Professor Challis, 'Philosophical Magazine,' vol. Xii. P. 678). To.