Document zdjqBoj9erL2K3JbwG8zeZR7g

372 OCCUPATIONAL TUMORS AND ALLIED DISEASES Central Europe. There were 842 cases of lung cancer in that territory during the years 1900 to 1927. In 1900 the incidence of lung cancer in relation to the total number of cancers observed was below 1 per cent, while it rose to 8 per cent for the years 1922-1924. A detailed analysis of the various records, pub lished by a great number of investigators, was made by Hruby and Sweany, who collected records of 185,434 autopsies performed from 1897 to 1933. There were 22,712 cases of cancer in this series, of which 1,355 were primary in the lungs. These workers found that the incidence of cancer in general in creased during this period by 65 per cent. At first the increase of lung cancer ran parallel with the general trend, but since 1914 it was higher and, following a temporary decline after 1928, there was a tenfold increase at that time over the incidence at the turn of the century (lung cancers represented 4.1 per cent of all cancers in 1897, compared to 16 per cent in 1928). c) Data supplied by investigators from individual institutions: Author Gillespie Hutchison Berblinger Wahl Kraft Probst - Klotz Dissmann Materna Holzer Husted and Biilmann Bonser Hutchison Berblinger Kikuth Hanf Ferenszy and Years 1899-1908 1909-1918 1919-1928 1907-1919 1920 1925 1910-1931 1917-1927 1925-1932 1906-1910 1911-1915 1916-1920 1921-1925 1910-1927 1925-1931 1921-1923 1920-1924 1914-1918 I9I9_I923 1924-1928 I929_I932 1933 1891-1932 1907 1920-1925 1920-1924 1923 1922-1925 i9H Per Cent of Lung Cancers among Autofsies 0.51 1.64 2.9X O.4O-O.93 I.07 2.05 O.96 1.12 1.6 O.II 0.38 0.59 0.97 0.82 10.85 8.0 7-98 2.0 0.5 3-3 7-3 10.3 S-3-7-5 1.0 3.1-4.0 8.3 9-4 7-5 5.0 Country England Germany Russia Switzerland Canada Czechoslovakia Denmark England Germany