TrELLEWELL'S VOCAL TELEGRAPHS, a Speaking Tube for Houses, Offices, Warehouses, Ac., are infallible. ..
... TrELLEWELL'S VOCAL TELEGRAPHS, a Speaking Tube for Houses, Offices, Warehouses, Ac., are infallible. Conversation can be carried on by persons 300 feet apart. HELLEWELL'S. NEW PATENT INDIA RUBBER SPONGES, GLOVE CLEANERS, HAND ENAMET.T.FaS, BATH BRUSHES ...