Muskegon, Mich., June 11. - The Allgemeiner Arbeiter Bund of Michigan is holding its twenty-eighth annual convention here, the session lasting three days. Many hundred delegates from all over the state are present. The business part of the city is profusely decorated with evergreens, flags and bunting, and the town presents a. gala appearance. The American and Germán national colors are liberally displayed. Wednesday a grand picnic was held in Lake Michigan park, and many excursionists from surrounding towns are taking part in the festivities.