Mind Test Asked For Manchester Accused SlayerMANCHESTER, N.H. lt;AP) -A petition seeking commitment of Alleged * murderer Edward Niton to the New Hampshire State Hospital in Concord for unity tests is scheduled to be filed in Hills*, boro County Superior Court today. The petition wai mailed yester-| day — a common procedure — by I County Attorney Conrad Dan a is.Niton Is accused of stabbing his, wife to death on August 3. He' pleaded innocent to a first degree j murder charge at his arraignment and was ordered held with-! out bail to await the September term of the Superior Court Funeral services for Mrs. BarV ara Nihin were held yesterday in Methuen, Mass,