Arcturus

a Bootes, the chief star in the Bootes. It is of the first magnitude, at an approximate distance of 3,000 billion The amount of heat received from Arcturus been roughly estimated by direct experiment, being found to equal that of a 3-inch cube of water at a distance of about 400 yards, Arcus Senilis, the opaque zone which with advancing age at the outer part of cornea. It appears earlier and becomes more in some persons than in others, and being to a proce of degeneration has been supposed serve as an index of the degree of degenerative existing in other parts of the body. It by no means to be relied on in this particular. ) Ardro an.