Early C20 Canadian ultraviolet therapy apparatus
1900-1930
1900-1930
1905; circa 1905
1993
1920
1925
1922
1926
circa 1919
1928
circa 1924
1929
circa 1921
1922
circa 1919
1925
circa 1921
1925
circa 1940
circa 1925
1922
circa 1920
1922
1955
1917-1926
1926
1919
circa 1934
1924-1933
1926-1931
1924-1933
1896-1913
1925-1934
1917-1926
1950-1961
1908-1934
1925-1934
1917-1934
1907-1924
1916-1924
1924-1926
1924-1933