Student being treated with a dental pick. The instructor (dentist) is on the left demonstrating the use of a dental pick to the students wearing pinstripe uniforms.
The cable car grip was invented in Upper Nyack. Garret A. Polhemus received a patent in 1885; it was reissued in 1886. The man demonstrating its use may have been the inventor. The owner of the original photograph is Marion Polhemus Adams of...