At a meeting of the Senior Class Button Committee held yesterday afternoon it was decided to depart from the former plan of obtaining designs from manufacturers, and to have a competition for the design among members of the Senior class instead. A simple device in orange and black, the class colors, containing either the numerals "1911" or the numeral "11" is suggested. The competition will close on Thursday, a week from today. Designs may be sent to E. A. Winsor '11, 60 Mt. Auburn street, before 6 o'clock on that date. The buttons, which are expected to cost about 25 cents each, will be put on sale shortly after a design has been chosen.