Accordingly it is believed that while partial cleavage of the vitamines may result only in a modification of their physiological properties, by certain means disruption may go so far as to effect a complete separation of nucleus and stabilizer, and if it does so will be followed by a loss of curative power due to isomerism.
"The Vitamine Manual"
Walter H. Eddy
Among the special may be named the parallelism between allotropy and isomerism; the numerous lines in the spectrum of each element; and the cyclical law of Newlands and Mendeljeff.
"Essays: Scientific, Political, & Speculative, Vol. I"
Herbert Spencer
isomerism of Fibrine, Albumen, and elements of nutrition.
"Familiar Letters of Chemistry"
Justus Liebig