Carbon was joined with silicon, zirconium and titanium, while boron, being trivalent, was relegated to another group. A general classification of elements, however, was not realized by Frankland, nor even by Odling, who had also investigated the question from the valency standpoint.
These views were extended by William Odling, and adopted by Gerhardt, but with modifications of Williamson's aspects.
"WILLIAM ODLING (1829-1921), English chemist, was born in Southwark Sept.
5 1829, the son of George Odling, surgeon.
Odling as Waynflete professor of chemistry at Oxford.