The formulation of this definition of chemistry was due to Robert Boyle.
2787) rightly points out that " resemblance in the subject or formulation of laws to toroth incorporated in H may point to a relation to the sources of H, but is not evidence that these laws were ever included in that collection."
The benzene nucleus presents a remarkable case, which must be considered in the formulation of any complete theory of valency.
An alternative view, due to Green, is that the oxygen atom of the xanthone ring is tetravalent, a supposition which permits the formulation of these substances as ortho-quinonoids.
It cannot be maintained that the ideas of Ephesians directly contradict either in formulation or in tendency the thought of the earlier epistles.