Measurement of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>Decays to Nonstrange States

Using the data from Fermilab experiment 691, we have observed signals for the decays ${{D}_{s}}^{\ifmmode\pm\else\textpm\fi{}}$ and ${D}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ and have analyzed these modes for the fraction due to ${\ensuremath{\rho}}^{0}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ and ${f}_{0}(975){\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$. In addition, we have searched for the decays ${{D}_{s}}^{\ifmmode\pm\else\textpm\fi{}}$ and ${D}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$. Values or upper limits are reported for the relative branching fractions for all of the above decays.