Mixed Set Of Two Laboratory Glass Adapters With Ground-Glass Stopcocks

Mixed set of two laboratory glass assemblies with stopcocks. One consists of a long glass tube with a slightly bulbous closed end, a ground-glass stopcock, ground-joint connections and a metal retaining fitting. The other is a bent three-arm glass adapter with a curved glass stopcock handle and a ground-joint connection. Signs of use, locally cloudy surfaces and yellowish ground joints. Detail props for laboratory and chemical industry sets. Their precise original application has not been identified; operation and leak-tightness have not been tested.