ClipArt ETC
A snow melting machine is a type of snow removal machine employed to melt snow as a means of snow removal.

Snow Melting Machine

A snow melting machine is a type of snow removal machine employed to melt snow as a means of snow removal.

"Cross-section of prismatic reflector, showing how light rays are refracted and dispersed." —Croft 1917

Prismatic Reflector

"Cross-section of prismatic reflector, showing how light rays are refracted and dispersed." —Croft…

"A prism is used to disperse ordinary light, and slits are cut in paper S to only allow yellow and blue light to pass. These two simple colors will be blended by the lens, forming a light that is nearly white. The effect of mingling any two colors may be determined in this way." -Avery 1895

Color Spectrum

"A prism is used to disperse ordinary light, and slits are cut in paper S to only allow yellow and blue…