It has frequently been maintained that ancient nations, some of whose art-works remain to us, knew secrets in metallurgy which have been lost and not yet recovered by us; and that in this way they were able to make bronze tools as hard as steel, or harder, to make metals which would not corrode, etc. Where one has a wish to prove that ancient races did not possess such knowledge, there is a conflict between theories and facts, resulting in attempts to find an explanation which will solve the dilemma. But where one has no reason for desiring to represent the ancients as not being so endowed, the facts present no difficulty. On the one hand we have monuments of the hardest stone, elaborately engraved with deep and accurate intaglio. On the other hand we know that many ancient civilizations were of extremely long duration, and that surviving offshoots of these great civilizations show a remarkable skill in many arts and industries. There is an _a priori_ probability that many processes were known which have not yet been rediscovered; and the fact that these architectural and sculptural remains exist merely increases that probability. With regard to incorruptible bronze, the following, which is condensed from the _Journal_ of the Royal Society of Arts (Britain), is interesting. Figures of the Buddha are found in the north of Siam in great numbers, on the sites of ancient temples which have been crumbling for centuries, leaving the figures standing amid the forest trees. The interesting thing about these figures is the perfect condition of the bronze after centuries of exposure to tropical suns and rains. This bronze is called by the natives "samrit"--the perfect or auspicious alloy--and its composition for a long time remained a secret, until, according to the American Consul at Bangkok, a few years ago the formula was discovered in an old Siamese manuscript belonging to the late King of Siam. The following is a translation: Take twelve ticals (one tical is equal to one half-ounce avoirdupois) weight of pure tin, melt it at a slow fire, avoiding bringing it to red heat. Pour two ticals weight of quicksilver, stir until the latter has become thoroughly absorbed and amalgamated, then cast the mixture in a mold, forming it into a bar. Take one catty in weight (eighty ticals) of refined copper and melt it; then gradually incorporate with it the amalgam, keeping in the meantime the fused mass well stirred. When this has been done, throw into the crucible a sufficient quantity of ashes obtained from the stems of the bua-bok (lotus) creeper so as to cover the molten metal. Remove the dross with an iron ladle. The metal remaining is samrit bronze.