Page:Chronicles of pharmacy (Volume 2).djvu/276

 a hexagonal structure with an atom of carbon at each angle, each united to one atom of hydrogen, and on one side a double link or bond, and on the other a single one, connecting it with the next carbon atom, the quadrivalency of each atom being thereby satisfied.

Born at Darmstadt, 1829; died at Bonn, 1896.

The formula is depicted in the margin, and is generally accepted; but it ought to be stated that it has rivals, though all are founded on the necessity of providing for the saturation of the four links of the carbon atoms.

H  C  /\\ HC  CH || | HC CH  \ // C  ||