iron—were intended to suggest that gold could be formed from them, the cross or spear attached being in fact the Egyptian phallus, or organ of generative vigour. In tin and lead there are evidences of the presence of silver. Perhaps more probable is the idea that these signs were originally combinations of letters—monograms, in fact, indicating the name which the planet bore in the country where the symbol was first adopted. Thus, in the sign for Jupiter, , the Greek initial for Zeus, has been traced; in that of Venus, , we have the initial of phosphorus; , has been supposed to be , and , the first and last letters of Thouros, one of the names of Mars; while represents the first and second letters of Chronos (Saturn) welded together. But the interpretation depends largely on the period when the signs were first used. Pictures preceded alphabets; they were in fact the originals of the phonetic sounds which ultimately the letters indicated.
The mysteries which made up so large a part of the science of alchemy passed from its votaries to the practitioners of physic and pharmacy, and are hardly dead in those professions yet. Pretended solutions of gold, vaunted as universal cures, were sold under the title of solar elixirs; the popular name of nitrate of silver to this day is lunar caustic; a black oxide of iron is called Ethiops martial; a solution of sugar of lead is extract of Saturn; sulphate of copper was once known as vitriol of Venus; muriate of tin was famous for the expulsion of worms under the name of Salt of Jove; and ointment of quicksilver is still universally labelled mercurial ointment.
