"Tetrad" Quotes from Famous Books
 ... for the historian to lay down the general principles on which he intends to act. Somewhat later, when he arrives at the history of the last years of St John, he is led to speak of the writings of this Apostle also; and as St John's Gospel completes the tetrad of Evangelical narratives, he inserts at this point his account of the Four Gospels. This account concludes as ...
— Essays on "Supernatural Religion" • Joseph B. Lightfoot
... to a single atom of hydrogen are said to be univalent or monad elements; whilst those which are equivalent to two atoms of hydrogen are termed bivalent or dyad elements; and those equivalent to three, four, five or six atoms of hydrogen triad, tetrad, pentad or hexad elements. But not only is the combining power or valency (atomicity) of the elements different, it is also observed that one element may combine with another in several proportions, or that its valency may ...
— Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 - "Chtelet" to "Chicago" • Various |
