Measurements of the Ratios ${cal B}(D_s^+to etaell^+ u)/{cal B}(D_s^+to phiell^+ u)$ and ${cal B}(D_s^+to etaell^+ u)/{cal B}(D_s^+to phiell^+ u)$

Using the CLEO~II detector we measure ${cal B}(D_s^+to eta e^+ u)/{cal B}(D_s^+to phi e^+ u) =1.24pm0.12pm0.15$, ${cal B}(D_s^+to eta e^+ u)/{cal B}(D_s^+to phi e^+ u) =0.43pm0.11pm0.07$ and ${cal B}(D_s^+to eta e^+ u)/{cal B}(D_s^+to eta e^+ u) =0.35pm0.09pm0.07$. We find the vector to pseudoscalar ratio, ${cal B}(D_s^+to phi e^+ u)/{cal B}(D_s^+to (eta+eta) e^+ u) =0.60pm0.06pm0.06$, which is similar to the ratio found in non strange $D$ decays.