The large-$q^2$ behavior of new elastic electron-scattering measurements from ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ is compared with the dimensional-scaling quark model. The slope change in $\frac{F_{{}_{}{}^3{}_{}{}^{}\mathrm{He}}}{F_{\mathrm{quark}}}$ for $q^2>2\mathrm{}$ Ge${\mathrm{V}}^2$ when compared to ${}_{}{}^2{}_{}{}^{}\mathrm{H}$ and ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ is conjectured to be evidence for scaling permitting the further synthesis of nucleon-nucleon and quark-gluon physical ideas.

• Received 2 March 1978

DOI:https://doi.org/10.1103/PhysRevLett.41.1155