The possibility that the hadron weak current contains an "exotic" strangeness-conserving isotensor component and/or an "exotic" strangeness-changing isospin-$\frac{3}{2}$ component is considered. Several neutrino experiments which can provide tests for the presence of such components are briefly described.

• Received 7 August 1972

DOI:https://doi.org/10.1103/PhysRevD.7.275