Then he went to work as an armature winder at the General Electric plant in Schenectady.
Through all his life, he was an avid reader, and was considered by Dixon Ryan Fox, President of Union College, the most widely read person of his time.
In November 1911, the Socialist Party of America won the elections in Schenectady County by pluralities, and Merrill was elected to the Assembly, sitting in the 135th New York State Legislature in 1912.
Before and after this tenure, he was a candidate for office on the Socialist, and later the American Labor ticket, at many elections for more than thirty years.
He died on March 5, 1956, in Ellis Hospital in Schenectady, New York; and was buried at the Blair Cemetery in Campton, New Hampshire.