A 152-year-old law firm will disband and its remaining attorneys will join the Harrisburg office of Philadelphia-based Cohen Seglias Pallas Greenhall & Furman P.C. Nauman Smith Shissler & Hall partners Joshua D. Bonn, Benjamin C. Dunlap Jr., J. Stephen Feinour and Craig J. Staudenmaier, and associate Nicholas O. Schwartz will join Cohen Seglias on Thursday along with a team of administrative professionals.