"Radiation" Health Ray Heater
1935
1935
1960s
1600-1700
1994
1891-1897
1880-1920
1880-1920
2017
circa 1960
1880-1920
1927
1933
1905
1980-1986
1890
1957
1894-1910
1922
1950
1963
1964
1880
1929
1905
1930-1970
1926
1938
1891-1897
1961
1920-1930
1890-1899
1962
1918-1930
1926