Summary 1. Ultraviolet absorption spectra measure- ments are recorded for aqueous solutions of D- glucosyl-N-butylamine and are compared with those for si:milar solutions of D-glucose in alkali. 2. The above data are interpreted as demon- s trating that the incipient coloration appearing ... [CONTRIBUTION FROM THE DEPARTMENT OF CHEMISTRY AND CHEMICAL ENGINEERING OF THE UNIVERSITY OF PENNSYL- VANIA] ... The Willgerodt Reaction. 11. A Study of ...