Professor Smyth suggests the origin of the term Pyramid from the two Coptic words, "_pyr_," "division," and "_met_," "ten." This derivation, which he first heard of in Cairo, is, he believes, a significant appellation for a metrological monument such as the Great Pyramid, and coincides with its five-sided, five-cornered, etc., features (see anteriorly, p. 255) and decimal divisions. But surely a name, which in this metrological and arithmetical view of "powers and times of ten and five," meant _division into ten_, and which divisional metrological ideas applied, according to Professor Smyth, to one pyramid only, namely the Great Pyramid of Gizeh, was not likely to have been applied as a general term to all the other pyramidal structures in Egypt--not one of which had, according to Professor Smyth himself, anything whatsoever of this metrological or divisional character in their composition and object. It is not likely that all these structures should have been named from a series of qualities supposed to belong to _one_; but altogether hidden and concealed, in these early times, even in that one pyramid, being for the information of future times and generations. In a similar spirit of exclusiveness, Mr. John Taylor derives the word pyramid from the two Greek words [Greek: pyros], _wheat_, and [Greek: metron], _measure_--apparently in the belief that the coffer or sarcophagus within one pyramid (the Great Pyramid) was intended as a chaldron measure of wheat--though none of the sarcophagi, in any of the many other royal pyramidal sepulchres of Egypt, were at all intended for such standard measures; and although, according to Mr. Taylor's theory, the Greeks, too, who out of their own language applied the term of Pyramid, or Wheat-Measurer, to all these structures,--never dreamed of the Great Pyramid or of any other of them having locked up in one of its concealed chambers a supposed standard measure of capacity of wheat, water, etc., for all nations and all times. Fifteen centuries ago, Ammianus Marcellinus derived the word pyramid from another Greek word [Greek: pyr], _fire_; because, as he argues, the Egyptian Pyramid rises to a sharp pointed top, like to the form of a fire or flame. This derivation, which, of course, excludes the mathematical idea of the sides of the pyramid being a series of flattened triangles that meet in a point at the apex, has been adopted by various authors.