As Greek coins were issued under the sanction of some god, it was natural that they should go out from his temple bearing his effigy and the symbols of his worship. Apollo succeeded to the early worship paid the sun and fire. He was the god of light and beauty. In his honor gold coins should originally have been struck, and they should bear his emblems. It will be of service to see what some of these were. This god was, on the whole, beneficent, as the influences of the sun are kindly, but he inflicted plagues by shooting his poisoned arrows among the people, just as the heat of the sun engenders deadly fevers. We have retained a trace of the old feeling, as our language betrays where consciousness utterly fails. We attribute certain sudden attacks of illness to _sunstroke_. That word "stroke" brings vividly before us the smiting of the Greek camp on the plain before Troy. Representing the sun, as Apollo did, the head of this god often appears radiated upon coins, particularly upon the coins of Rhodes. This was as the poets were wont to describe him. Catullus alludes to his flashing eyes,--"_radiantibus oculis_." Tibullus speaks of him as this youth having his temples bound with sacred laurel--"_hic juvenis casta redimitus tempora lauro_" The use of the laurel was reserved to this god, and in times of primitive Greek and Roman piety it was allowed to men only whose successful general would celebrate a triumph. The palm-branch is also connected with the worship of this god, in allusion to the sacred palm-tree under which Leta gave birth to him and to Artemis. The rays, the laurel, and the palm are the symbols of Apollo upon our coins. Other nations have employed the bow, the lyre, and the tripod, with many more equally familiar symbols. The coinage of silver belonged peculiarly to Zeus, the god of the thunderbolt. The question arises at once, Was there fancied a resemblance between the whiteness of this metal and dazzling brightness of the flash of lightning? However that question may be answered, there remains the fact that the thunderbolt was a symbol of the power of Zeus, and its figure uniformly accompanied the effigy of the god. Ovid speaks of Zeus as of one whose hand is armed with three-forked fires,-- _"Cui deutra trisulces Ignibus armata est."_