The formulation of this definition of chemistry was due to Robert Boyle.
The benzene nucleus presents a remarkable case, which must be considered in the formulation of any complete theory of valency.
The formulation of the atomic theory by John Dalton gave a fresh impetus to the development of quantitative analysis; and the determination of combining or equivalent weights by Berzelius led to the perfecting of the methods of gravimetric analysis.
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.
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