The page numbers you give are particular to the publisher of the book in which you are reading the play. Those numbers do not apply universally. I believe, however, you are referring to the second scene of Act 3, when Danforth tells Mr. Hale why there is no need for lawyers in the witchcraft proceedings. Danforth says that in a normal court of law, lawyers call upon eye witnesses to accuse or to defend the accused. However, he says, witchcraft is an invisible crime, meaning that witches can send invisible spirits out to do their evil work while they, the witches, sit peacefully at home or in public in full view of witnesses. Therefore, Danforth contends, the court can take the word of the victims at full value without those supposed victims providing any sort of physical proof against those they accuse of attacking them.