Born in
New Boston, New Hampshire, Wason attended public and private schools and
Francestown Academy. He was graduated from the
New Hampshire College of Agriculture and the Mechanic Arts at
Hanover in 1886 and from
Boston University School of Law in 1890. He was
admitted to the bar in 1890 and commenced practice in
Nashua, New Hampshire. Wason was sergeant at arms, assistant clerk, and later clerk of the
New Hampshire Senate. He served as member of the Nashua Board of Education, 1891–1895, serving as its president in 1895. He was city solicitor of Nashua in 1894 and 1895, and served as president of the common council in 1897 and 1898. He was an
alderman of Nashua, 1906–1908. He served in the
New Hampshire House of Representatives in 1899, 1909, and 1913, and as member of the state constitutional conventions in 1902 and 1912. He served as solicitor of
Hillsborough County, 1903–1907. He served as president of the Citizens' Guaranty Savings Bank of Nashua, 1904–1941, and he also engaged in agricultural pursuits in
Merrimack from 1906 to 1941. Wason was elected as a
Republican to the
64th United States Congress and to the eight succeeding Congresses (March 4, 1915 – March 3, 1933). He was not a candidate for renomination in 1932. He retired from public life in 1933 and resided on his estate near New Boston, where he died February 6, 1941. He was interred in New Boston Cemetery. ==References==