Description

Our unique Chem Time Clock replaces the usual clock numbers with symbols of elements having corresponding atomic numbers. "H" replaces "1", "He" replaces "2", etc. The idea for this clock came from Prof. Bassam Shakhashiri at the University of Wisconsin, who asked Ron Perkins to make one in the summer of 1983. It is the perfect addition to a science classroom. (Requires 1 AA Battery - not included.) 13" diameter. Attractive green border.