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Popular passages
Page 244 - property of visible phenomena distinct from form and from light and shade, depending on the effect of light of different wave lengths on the retina,
Page 288 - arc has the disadvantage that it must operate on 110 volts at relatively high wattages and that, if the connection is broken, the arc must be allowed to cool for several minutes before it will strike again. Therefore, it is not particularly satisfactory as a portable unit for instantaneous work. The
Page 234 - MIXTURE DIAGRAM ACCORDING TO THE 1931 CIE STANDARD OBSERVER AND COORDINATE SYSTEM Basic Stimulus: Equal Energy. Interpolation to every
Page 288 - mercury arc is also a reasonably efficient source of ultraviolet light, though most of its energy is concentrated in the 2,536 Angstrom unit spectral range. It is not generally used for the activation of the luminescent materials
Page 260 - by the Forest Products Laboratory, Forest Service, United States Department of Agriculture. At
Page 288 - Angstrom units. It is comparatively easy to remove the visible energy from such an arc by means of a nickel oxide glass filter, resulting in a highly efficient source of activating energy.
Page 274 - a. Crumbling, which develops from checking, consists in the falling away of tiny fragments of coating cut off when the fissures become interwoven
Page 270 - depends almost entirely on the composition of the paint, the intensity of sunlight, and the temperature and relative humidity of the
Page 275 - except that the fragments of coating that fall off may be somewhat larger and may not begin to