SKY

the apparent arch or vault of extending from horizon to heaven horizon. Many theories have been to account for the blue color of framed s. This is really but a secondary the problem, for the fundamental questio n Why is there any light or color there is, Clearly, if there were nothing or at all? nothing opaque above us, the s. would black; that it does not is due show evidently to the presence of finely matter capable of reflect i ng divided if we admit that tiny particle s light, and we can readily understand that are there dispersion of light causes the blue their s., which becomes deeper, at higher of the The presence of these par altitudes. answerable, too, for the phenom - ticles is and everything else which ena of twilight reflective and refract i ve effects involves in the atmosphere. 20’ N., 6° 15’ W.), island,