Much of the earliest success of Frank L., Robert C., and John W. Fenton's glass was undoubtedly due to the genius of  their first superintendent of glass, Jacob Rosenthal. His formulations were passed on to his son, Paul. Paul Rosenthal worked as the company's factory manager from 1929 to 1949. On his retirement, Fenton bought the rights to some 50 distinctive glass formulas. In the late forties and early fifties, Frank M. Fenton himself, along with Lawrence Badgely and Harold Riggle, took over the duties in the Fenton Laboratory. In 1950, Isaac Willard joined the company and became the "official" glass technologist.
    In the 100-year history of Fenton Glass, there are, of course, many different types of  what is collectively called "Fenton". Some collectors focus on the earliest carnival glass, others prize the opalescent lines of the depression years, others collect exclusively Fenton milk glass or Fenton hobnail.
    Here is a brief synopsis of the various Fenton lines and molds.

workers rotated their hours so as to keep as many people working as possible; even if that meant working barely half of a work week. Labor agitators were able to effect a strike against the company in 1936, but it lasted but three days. Frank M., who had always been highly regarded by the Union leadership, was able to craft a quick compromise. The synergy between Fenton Glass and its unionized labor force produced one of the great success stories in the history of organized labor.
    It is fair to say that the accounts the company had with A.F. Dormeyer and the Allen B. Wrisley Co., both of Chicago, saved the company. Wrisley was a maker of perfumes and the timely sales of Fenton's hobnail perfume bottles (in very high quantities) brought the company back from the brink (this was known as the #289 Bottle). In