Section 28F. If an appearance is entered and answer filed, the case shall be set down for speedy hearing, but a default and order shall first be entered against all persons who have not appeared and answered, in the manner provided in section twenty-eight E. Such hearing shall be conducted in accordance with the usual course of proceedings in equity including all rights of exception and appeal. At such hearing the court may receive the testimony of experts and may receive evidence as to the literary, artistic, political or scientific character of said book and as to the manner and form of its dissemination. Upon such hearing, the court may make an adjudication in the manner provided in said section twenty-eight E.